GLASSTIPS: TRANSPARENTS
What to expect from selected Bullseye sheet glass.

This handy reference guide explains what you can expect from your Bullseye sheet glass colors before and after heatwork in the kiln. Click on the small style swatches to the left to get info on individual colors. Check back to explore additional styles as they are added.


OPALESCENTS     TRANSPARENTS


 

TRANSPARENT NOTES

For each style, the top row shows the double-rolled, unfired cold glass color. For stained glass, refer to the top row.

The same glass after firing to a full fuse is shown directly below the cold glass. For kilnformed glass, refer to the bottom row.

Swatches shown are about two inches wide.

GlassTips describe ONLY the results of standard full fuse + slumping firings, i.e.: glass 6mm thick, 10" (25cm) square, fired to 1480°F (804°C), held for 10 minutes, then fired a second time to 1250°F (677°C) for 30 minutes.

To best ensure success, test glasses before use under your specific firing conditions. Use GlassTips information as a starting point only.

Glass reactivity: Not all reactions are visible. Some are too weak to be seen and others are masked by dark color.

"Striking glasses" change dramatically to reach target color during firing. Colors may vary, depending on firing schedule, rate, atmosphere, and heatwork. For color-sensitive projects, test before use.

Key to icons

Copper Copper   Lead Lead   Selenium Selenium   Silver Silver   Sulfur Sulfur    Striker


REACTIVE ICE CLEAR 001009

001009 Reactive Ice Clear  

   May react with: Copper Silver

Cold characteristics
Similar appearance to 001101 except it may include a slight tint of color (blue to green).

Working notes
Easily confused with 001101. Reactive combinations have the potential to create an interface color, which may continue to develop through multiple firings. Copper-based reactions tend to be variations of deep red to black, while silver based reactions are more likely to develop as earth-tones. Reactions are generally related to the amount of copper and silver content, heatwork and surface area contact. Learn more about this style by downloading our Get a Reaction PDF.

-0031 (rainbow irid)
Strong reactions may permeate the iridized surface, finding greater surface contact through thinner sections of the irid coating (gold, silver) and minute fissures throughout. Crackle patterning is generally more open where the irid coating is thicker and transitions to dense coverage in thinner sections. Expect variation.

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LIGHT ORANGE STRIKER 001025

001025 Light Orange Striker

   Contains: Selenium Sulfur

   May react with: Copper Lead Silver

Striker

Cold characteristics
Striker. May vary from transparent clear to pale yellow.

Working notes
Fires to a stable, consistent color. This style not suitable for kilncasting because it can opalize when held at high temperatures for a long time. It may also opalize in other instances in which processes exceed the parameters of the test for compatibility.

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CLEAR 001101

001101 Clear  
 

Cold characteristics
Very faint green tint when viewed on edge.

Working notes
Stable. No color shift.

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DEEP PLUM 001105

001105 Deep Plum  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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LIGHT GREEN 001107

001107 Light Green  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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AQUAMARINE BLUE 001108

001108 Aquamarine Blue  
 

Cold characteristics
Ranges from bluer-green to greener-blue.

Working notes
Stable. No color shift.

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DARK ROSE BROWN 001109

001109 Dark Rose Brown  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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AVENTURINE GREEN 001112

001112 Aventurine Green  
 

Cold characteristics
A supersaturated chrome glass with metal flake glints in reflected light.

Working notes
Stable. No color shift.

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DEEP ROYAL BLUE 001114

001114 Deep Royal Blue  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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TURQUOISE BLUE 001116

001116 Turquoise Blue

   Contains: Copper

   May react with: Selenium Sulfur

Cold characteristics
Fairly consistent color from run to run in cold sheet.

Working notes
A copper glass. May have black interface reaction with certain cadmium and/or sulfur glasses (001137, 001437, 000137, 000120, 000125, 001125, etc.).

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MIDNIGHT BLUE 001118

001118 Midnight Blue  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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SIENNA 001119

001119 Sienna

   Contains: Selenium Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Consistent color.

Working notes
This style not suitable for kilncasting because it can opalize when held at high temperatures for a long time. It may also opalize in other instances in which processes exceed the parameters of the test for compatibility.

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YELLOW 001120

001120 Yellow

   Contains: Sulfur

   May react with: Copper Silver

Cold characteristics
Consistent color.

Working notes
A cadmium glass. May fire slightly deeper than the cold sheet. May react with copper glasses. See notes on 001116. This style not suitable for kilncasting because it can opalize when held at high temperatures for a long time. It may also opalize in other instances in which processes exceed the parameters of the test for compatibility.

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RED 001122

001122 Red

   Contains: Selenium Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Variations from orange-red to dark red. "Catspaw" windows of lighter coloration typical of single-rolled sheets.

Working notes
A cadmium/selenium glass. Generally fires deeper (more red) than cold sheet. "Catspaw" effect disappears on firing. See general notes on striking glasses. This style not suitable for kilncasting because it can opalize when held at high temperatures for a long time. It may also opalize in other instances in which processes exceed the parameters of the test for compatibility.

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ORANGE 001125

001125 Orange

   Contains: Selenium Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Some variation from more yellow-orange to red-orange.

Working notes
A cadmium/selenium glass. Generally fires deeper (more red) than cold sheet. See general notes on striking glasses. This style not suitable for kilncasting because it can opalize when held at high temperatures for a long time. It may also opalize in other instances in which processes exceed the parameters of the test for compatibility.

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CHARTREUSE 001126

001126 Chartreuse

   Contains: Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Color may appear varied in density.

Working notes
More consistent color density. No shift in hue. With excessive heatwork, color opalizes and turns a dense green/brown.

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DEEP ROYAL PURPLE 001128

001128 Deep Royal Purple  
 

Cold characteristics
Very dark glass. Little light transmission in 3 mm thickness.

Working notes
Stable. No color shift.

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CHARCOAL GRAY 001129

001129 Charcoal Gray  
 

Cold characteristics
Very dark glass. May have very slight pink/purple coloration of gray.

Working notes
Stable. No color shift.

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MEDIUM AMBER 001137

001137 Medium Amber

   Contains: Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Varies slightly from lighter to darker shade.

Working notes
A sulfur glass. May have dark interface reaction with copper-bearing (001116, 001408, 001417, 000116, 000144, 000145, 000147) and lead-bearing (001311, 001215, 000301, 000305) glasses.

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AVENTURINE BLUE 001140

001140 Aventurine Blue  
 

Cold characteristics
Cold sheet has grainy, sandy surface texture. Even though this style is listed in the ‘Transparent’ glass category, very little light is transmitted through the 3mm sheet.

Working notes
Stable, no color shift. Softens more than most glasses at fusing temperature. Even though this style is listed in the ‘Transparent’ glass category, note that it does not transmit light in the 3mm sheet.

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OLIVE GREEN 001141

001141 Olive Green  
 

Cold characteristics
Consistent color.

Working notes
No color shift. Color may become slightly cloudy when held at high temperatures for a long time.

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KELLY GREEN 001145

001145 Kelly Green

   Contains: Copper

   May react with: Selenium Sulfur

Cold characteristics
Consistent color.

Working notes
Color may become slightly cloudy when held at high temperatures for a long time.

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LIGHT CORAL STRIKER 001205

001205 Light Coral Striker

   Contains: Lead

   May react with: Selenium Sulfur

Striker

Cold characteristics
Striker. Transparent clear. On edge, resembles 001101.

Working notes
Fires to a stable, consistent color.

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FERN GREEN 001207

001207 Fern Green

   Contains: Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Lighter than 001107.

Working notes
Consistent, solid color.

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LIGHT PINK STRIKER 001215

001215 Light Pink Striker

   Contains: Sulfur

 

Striker

Cold characteristics
Varies from lighter to darker; sometimes with lighter dappling in single-rolled sheets. Generally lighter and slightly more blue/pink than 001311.

Working notes
Color usually deepens on firing. Possible dark interface reaction with selenium and/or sulfur glasses (001122, 001125, 000124, 000125, 001137, 001437, 000137). Less viscous (softer) than most other glasses. Some striking glasses like this one need to be fired slowly during the initial stages of the firing cycle. If fired too fast they may not strike at all or they may strike, but appear spotty and have a blue-brown cast as opposed to the desired target color. A standard full-fuse schedule should work to strike these glasses:

Rate    Temp    Hold
400     1250    :45
600     1480    :10
9999    960     *

*Remainder of cycle depends on thickness of piece. Consult TechNotes on our website for an annealing chart. For projects that are especially color-sensitive, we recommend fusing a small sample, with a similar setup in the same kiln, to best predict final color results.

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VIOLET STRIKER 001234

001234 Violet Striker

   Contains: Lead

   May react with: Selenium Sulfur

Striker

Cold characteristics
A deep royal blue color.

Working notes
Fires to a consistent, transparent violet. Color may become slightly cloudy when held at high temperatures for a long time.

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PINE GREEN 001241

001241 Pine Green

   Contains: Sulfur

   May react with: Copper Lead Silver

Cold characteristics
May include brown areas.

Working notes
At full-fuse temperatures, the brown areas appear as transparent wisps. Such wisping is more noticeable in a thin (-50) sheet and would be amplified by fusing an opalescent glass style under it. Unless a pure pine green is desired, these uniform wisps could be used as a design feature.

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SUNSET CORAL 001305

001305 Sunset Coral

   Contains: Lead

   May react with: Selenium Sulfur

Cold characteristics
Color is transparent and varies in density.

Working notes
Fires to a consistent, more highly saturated color. May turn lighter and more transparent when held at high temperatures for a long time.

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CRANBERRY PINK 001311

001311 Cranberry Pink

   Contains: Lead

   May react with: Selenium Sulfur

Cold characteristics
Varies slightly from lighter to darker shade; sometimes with lighter dappling in single-rolled sheets.

Working notes
Color will almost always deepen on firing. Possible dark interface reaction with selenium and/or sulfur glasses (001122, 001125, 000124, 000125, 001137, 001437, 000137). Less viscous (softer) than most other glasses. Some striking glasses like this one need to be fired slowly during the initial stages of the firing cycle. If fired too fast they may not strike at all or they may strike, but appear spotty and have a blue-brown cast as opposed to the desired target color. A standard full-fuse schedule should work to strike these glasses:

Rate    Temp    Hold
400     1250    :45
600     1480    :10
9999    960     *

*Remainder of cycle depends on thickness of piece. Consult TechNotes on our website for an annealing chart. For projects that are especially color-sensitive, we recommend fusing a small sample, with a similar setup in the same kiln, to best predict final color results.

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MARIGOLD YELLOW 001320

001320 Marigold Yellow

   Contains: Selenium Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Consistent color.

Working notes
This style not suitable for kilncasting because it can opalize when held at high temperatures for a long time. It may also opalize in other instances in which processes exceed the parameters of the test for compatibility.

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CARNELIAN 001321

001321 Carnelian

   Contains: Selenium Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Consistent color.

Working notes
Stable and consistent color. This style not suitable for kilncasting because it can opalize when held at high temperatures for a long time. It may also opalize in other instances in which processes exceed the parameters of the test for compatibility.

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GARNET RED 001322

001322 Garnet Red

   Contains: Selenium Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Appears light in color saturation with thin threads of color variation.

Working notes
Matures to a more consistent color with deeper saturation. May contain subtle threads of darker color. This style not suitable for kilncasting because it can opalize when held at high temperatures for a long time. It may also opalize in other instances in which processes exceed the parameters of the test for compatibility.

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FUCHSIA 001332

001332 Fuchsia

   Contains: Lead

   May react with: Selenium Sulfur

Cold characteristics
Consistent color.

Working notes
May become cloudy with excessive heatwork.

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GOLD PURPLE 001334

001334 Gold Purple

   Contains: Lead

   May react with: Selenium Sulfur

Cold characteristics
Appears as a dark transparent. May appear to be blue in color.

Working notes
Fires to a consistent, transparent, deep purple.

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CRYSTAL CLEAR 001401

001401 Crystal Clear  
 

Cold characteristics
Brilliant colorless clear.

Working notes
When fired over colored glass, allows more pure, true hue of base color to show. Especially true in thicker sections.

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LIGHT PLUM 001405

001405 Light Plum  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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STEEL BLUE 001406

001406 Steel Blue  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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LIGHT AQUAMARINE 001408

001408 Light Aquamarine

   Contains: Copper

   May react with: Selenium Sulfur

Cold characteristics
Consistent color.

Working notes
A copper glass. Possible dark interface reactions with sulfur (000137, 001137, 001437) glasses.

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LIGHT BRONZE 001409

001409 Light Bronze  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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LIGHT AVENTURINE GREEN 001412

001412 Light Aventurine Green  
 

Cold characteristics
Consistent color.

Working notes
Opalizes slightly upon firing.

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LIGHT SKY BLUE 001414

001414 Light Sky Blue  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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LIGHT TURQUOISE BLUE 001416

001416 Light Turquoise Blue

   Contains: Copper

   May react with: Selenium Sulfur

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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EMERALD GREEN 001417

001417 Emerald Green

   Contains: Copper

   May react with: Selenium Sulfur

Cold characteristics
Slight variation within blue to yellow range.

Working notes
A copper glass. Possible dark interface reactions with sulfur (000137, 001137, 001437) glasses.

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TAN 001419

001419 Tan  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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SPRING GREEN 001426

001426 Spring Green  
 

Cold characteristics
Slight variation within blue to yellow range.

Working notes
Stable. No color shift.

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LIGHT VIOLET 001428

001428 Light Violet  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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LIGHT SILVER GRAY 001429

001429 Light Silver Gray  
 

Cold characteristics
Slight variations from lighter to darker.

Working notes
Stable. No color shift.

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LIGHT AMBER 001437

001437 Light Amber

   Contains: Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Varies slightly from lighter to darker shade.

Working notes
A sulfur glass. May have dark interface reaction with copper-bearing (001116, 001408, 001417, 000116, 000144, 000145, 000147) and lead-bearing (001311, 001215, 001301, 000305) glasses.

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KHAKI 001439

001439 Khaki  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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NEO-LAVENDER 001442

001442 Neo-lavender  
 

Cold characteristics
Color variations from pink to blue depending on light in which viewed: natural, incandescent, or fluorescent.

Working notes
When fused over other colors, (e.g. red, orange), may tend to deepen or brighten them.

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SEA BLUE 001444

001444 Sea Blue  
 

Cold characteristics
Consistent color.

Working notes
Stable, no color shift.

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OREGON GRAY 001449

001449 Oregon Gray  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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TRUE BLUE 001464

001464 True Blue

   Contains: Copper

   May react with: Selenium Sulfur

Cold characteristics
Consistent color.

Working notes
Stable, no color shift.

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JUNIPER BLUE TINT 001806

001806 Juniper Blue Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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GRASS GREEN TINT 001807

001807 Grass Green Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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AQUA BLUE TINT 001808

001808 Aqua Blue Tint

   Contains: Copper

   May react with: Selenium Sulfur

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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INDIGO TINT 001818

001818 Indigo Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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BROWN TOPAZ TINT 001819

001819 Brown Topaz Tint  
 

Cold characteristics
Consistent tint throughout sheet.

Working notes
Color is stable over extended range.

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PALE YELLOW TINT 001820

001820 Pale Yellow Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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ERBIUM PINK TINT 001821

001821 Erbium Pink Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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BURNT SCARLET TINT, STRIKER 001823

001823 Burnt Scarlet Tint, Striker

   Contains: Lead Silver

   May react with: Selenium Sulfur

Striker

Cold characteristics
Appears almost clear with blue/green tints.

Working notes
Matures to a consistent burnt-scarlet tint. Some striking glasses like this one need to be fired slowly during the initial stages of the firing cycle. If fired too fast they may not strike at all or they may strike, but appear spotty and have a blue-brown cast as opposed to the desired target color. A standard full-fuse schedule should work to strike these glasses:

Rate    Temp    Hold
400     1250    :45
600     1480    :10
9999    960     *

*Remainder of cycle depends on thickness of piece. Consult TechNotes on our website for an annealing chart. For projects that are especially color-sensitive, we recommend fusing a small sample, with a similar setup in the same kiln, to best predict final color results.

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RUBY RED TINT, STRIKER 001824

001824 Ruby Red Tint, Striker

   Contains: Lead

   May react with: Selenium Sulfur

Striker

Cold characteristics
Appears close to clear with blue/green tints.

Working notes
Matures to a consistent ruby red tint. Some striking glasses like this one need to be fired slowly during the initial stages of the firing cycle. If fired too fast they may not strike at all or they may strike, but appear spotty and have a blue-brown cast as opposed to the desired target color. A standard full-fuse schedule should work to strike these glasses:

Rate    Temp    Hold
400     1250    :45
600     1480    :10
9999    960     *

*Remainder of cycle depends on thickness of piece. Consult TechNotes on our website for an annealing chart. For projects that are especially color-sensitive, we recommend fusing a small sample, with a similar setup in the same kiln, to best predict final color results.

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GREEN TEA TINT 001826

001826 Green Tea Tint

   Contains: Selenium Sulfur

   May react with: Copper Lead

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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LIGHT AMBER TINT 001827

001827 Light Amber Tint

   Contains: Selenium Sulfur

   May react with: Copper Lead

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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GRAY TINT 001829

001829 Gray Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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RUBY PINK TINT, STRIKER 001831

001831 Ruby Pink Tint, Striker

   Contains: Lead

   May react with: Selenium Sulfur

Striker

Cold characteristics
Appears almost clear with blue/purple tint.

Working notes
Matures to a consistent ruby pink tint. Becomes more pink with excessive heatwork. Some striking glasses like this one need to be fired slowly during the initial stages of the firing cycle. If fired too fast they may not strike at all or they may strike, but appear spotty and have a blue-brown cast as opposed to the desired target color. A standard full-fuse schedule should work to strike these glasses:

Rate    Temp    Hold
400     1250    :45
600     1480    :10
9999    960     *

*Remainder of cycle depends on thickness of piece. Consult TechNotes on our website for an annealing chart. For projects that are especially color-sensitive, we recommend fusing a small sample, with a similar setup in the same kiln, to best predict final color results.

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CORAL ORANGE TINT 001834

001834 Coral Orange Tint

   Contains: Selenium

   May react with: Copper Lead Silver

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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MEDIUM AMBER TINT 001837

001837 Medium Amber Tint

   Contains: Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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DARK AMBER TINT 001838

001838 Dark Amber Tint

   Contains: Sulfur

   May react with: Copper Lead Silver

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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SPRUCE GREEN TINT 001841

001841 Spruce Green Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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LT NEO-LAVENDER SHIFT TINT 001842

001842 Lt Neo-Lavender Shift Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift. The hues of shift colors change depending on the thickness and/or lighting of the casting.

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LAVENDER GREEN SHIFT TINT 001844

001844 Lavender Green Shift Tint  
 

Cold characteristics
Color may shift from purple to green depending on light source and thickness.

Working notes
Color is stable over extended range.

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LIGHT RHUBARB SHIFT TINT 001858

001858 Light Rhubarb Shift Tint  
 

Cold characteristics
Color may shift from red to green depending on light source and thickness.

Working notes
Color is stable over extended range.

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RHUBARB PINK/GREEN SHIFT TINT 001859

001859 Rhubarb Pink/Green Shift Tint

   Contains: Selenium

   May react with: Copper Lead Silver

Cold characteristics
Consistent color.

Working notes
Stable. No color shift. The hues of shift colors change depending on the thickness and/or lighting of the casting.

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GRAY BLUE TINT 001864

001864 Gray Blue Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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OLIVE SMOKE TINT 001867

001867 Olive Smoke Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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OLIVINE TINT 001877

001877 Olivine Tint  
 

Cold characteristics
Consistent tint throughout sheet.

Working notes
Color is stable over extended range.

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LEMON TINT 001920

001920 Lemon Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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FUCHSIA TINT 001932

001932 Fuchsia Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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COPPER TINT 001934

001934 Copper Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift. Despite its name, Copper Tint contains no copper and is not a reactive glass.

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PURPLE BLUE TINT 001948

001948 Purple Blue Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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LAVENDER GRAY TINT 001964

001964 Lavender Gray Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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PINE GREEN TINT 001977

001977 Pine Green Tint  
 

Cold characteristics
Consistent color.

Working notes
Stable. No color shift.

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