Author Topic: A sample of colorants for SP87  (Read 179 times)

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A sample of colorants for SP87
« on: January 25, 2019, 09:41:47 PM »
Here's a simple paste from a document obtained from Craftweb which seems to use SP87 batch or color base as a starting material. I have not used these! Some of these chemicals are toxic. USE WITH EXTREME CARE.

The original word document is attached for convenience.

Glass recipes
Crystal Colors
 
Transparent Yellow
19 lbs color base
*40 gr. cadmium sulfide
25 gr. selenium
*20 gr. sulfur
70 gr. potash
*90 gr. soda ash

Transparent Amber
19 lbs color base   (you may deepen this color by increasing the sulfur up to 80 gr.)
*40 gr. sulfur
*5 gr. sugar
*85 gr. soda ash

Transparent Red / striking color
19lbs color base
*80 gr. cadmium sulfide
40 gr. selenium
*400 gr. zinc oxide
100 gr. potash
*65 gr. soda ash

Tea
20lb Pellets
350g Manganese dioxide
90g black iron oxide

Transparent Violet
19 lb color base
160g manganese dioxide
6g cobalt carbonate
*85g soda ash

Transparent Green /Yellow
19lb color base
*20g potassium dichromate
*85g soda ash


* You must screen or sift these ingredients to get rid of lumps
Transparent Dark Green
19lb color base
120g  potassium dichromate
100g black copper oxide
85g soda ash

Transparent Cobalt Blue
20lb batch pellets
55g cobalt carbonate
*10g soda ash

Transparent Green
19lb color base
40g potassium dichromate
8g copper carbonate
*85g soda ash

Transparent Aqua
19lb color base
40g potassium dichromate
110g black copper oxide
*90g soda ash

Transparent Royal Blue
20lb color base
12g black nickel oxide
80g copper carbonate
20g cobalt carbonate
*75g soda ash

Transparent Copper Blue
19lb color base
100g black copper oxide

   You must screen or sift these ingredients to get rid of lumps


Black
19lb color base
220g manganese dioxide
20g cobalt carbonate
112g black nickel oxide
*130g soda ash

Black(stiff)
19lb color base
112g  black nickel oxide
220g  manganese dioxide
20g cobalt carbonate
*65g alumina hydrate
*65g soda ash

Transparent Grey
19lb color base
10g black nickel oxide
.5g cobalt oxide

   You must screen or sift these ingredients to get rid of lumps




Opal Colors


Opal White/striking
19lb color base
*570g STP
570g boric acid
*600g silica flour
             Or
19lb color base
470g STP
470g boric acid
560g silica

Opal Yellow / striking color
18lb color base
*40g cadmium sulfide
25g selenium
*20g sulfur
*650g zinc oxide
70g potash
*90g soda ash

Opal Orange
18 lb color base
40g selenium
*40g cadmium
20g sulfur
*650g zinc oxide
70g potash
*90g soda ash

Opal Green
19lb color base
470g STP
470g boric acid
560g silica
10g black copper oxide
45g potassium dichromate

Opal Light Sky Blue
19lb color base
*470g STP
470g boric acid
*560g silica
70g black copper oxide

Opal Lapis
19lb color base
*470g STP
470g boric acid
*520 silica
55g cobalt carbonate

Opal Blue
19lb color base
*570g STP
570g boric acid
*600g silica
12g black nickel oxide
40g copper carbonate
10g cobalt carbonate


* You must screen or sift these ingredients to get rid of lumps

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The Penland Additives
« Reply #1 on: February 02, 2019, 11:59:17 AM »
Penland Additive Formulas for 19 pounds of batch. (Dave Bross noted: I think this may be wrong, seems like an awful lot of colorant for 20# of batch on some of these)

Recall that "bone ash" in these is for a specific phosphate source that is no longer available (Bone Ash 21). I found Bone Ash on Amazon and other sources but I worry that it's just not the same. Besides, true bone ash would have loads of calcium which Dave Bross found negatively impacted melting an opal phosphate glass. I would suggest substituting a pure phosphate such as sodium tripolyphosphate (STP, STPP).

The soda ash add back is important as SP color base has a subtraction of 1.7lbs soda nitrate for every 98 lbs of batch (Kenny Pieper). The nitrate is removed to prevent oxidation in the glass.

No Melting instructions are included. Dave suggests using the colorant percentages to make colored versions of your own glass batch formula. As I move on to different colors I'll be trying and discussing the details of making these successfully.

A note on Mixing: SP color base must be mixed before using. So...you have to have a way of completely mixing up 100lbs of batch before getting started. For the colorants, add them into a separate container and mix completely before adding into the base. Try dumping a little batch into a bucket and a little colorant...mix. Repeat until all ingredients are in the bucket and then mix again...a lot (Drill with paddle bit or whatever works for you).

Purple: 200g mang dioxide, 90g soda ash.

Opal Purple: 70g mang dioxide, 15g cobalt carb, 450g bone ash, 95g soda ash.

Violet: 150g mang dioxide, 5 10g cobalt carb, 65g soda ash.

Opal Yellow: 110g cadmium sulfide, 20g sulfer, 650g zinc oxide, 70g. pot ash, 90g soda ash.

Yellow: 128g cadmium sulfide, 660g zinc oxide, 68g pot ash, 95g soda ash.

Yellow Orange (for 18lbs): 40g selenium, 650g zinc oxide, 110g cadmium sulfide, 140g pot ash.

Opal Green: 50g potassium dichromate, 20g black copper oxide, 450g bone ash, 85g soda ash.

Opal Green 2: 25g potassium dichromate, 10g black copper oxide, 90g borax.

Opal Jade: 40g black copper oxide, 20g potassium dichromate, 450g bone ash, 95g soda ash.

Turquoise: 200g copper carb, 55g potassium dichromate, 95g soda ash.

Blue: 200g copper carb, 7g cobalt carb, 25g potassium dichromate, 90g soda ash.

Med Dark Blue: 150g black copper oxide, 90g soda ash.

Opal Dark Copper Blue: 240g black copper oxide, 405g bone ash, 90g soda ash.

Lapis: 50g cobalt carb, 180g borax.

Opal Lapis: 30g cobalt carb, 10g black copper carb, 450 bone ash, 85g soda ash.

Opal Red: 128g cadmium sulfide, 64g powdered selenium, 600g zinc oxide, 68g pot
ash. 430g bone ash, 430g bone ash, 95g soda ash. To darken, add 72g selenium, 90g pot ash.

Pink (18lbs): 40g selenium, 90g cadmium sulfide, 600g zinc oxide, 68g pot ash, 80g soda ash.

Black: 231 mang dioxide, 11g potassium dichromate, 32g cobalt carb, 118g black
nickel oxide.