Potassium Carbonate Anhydrous - 1 lb for Photographersfrom Potassium Carbonate Anhydrous - 1 lb for Photographerscan be used as an alkali accelerator in concentrated developer solutions. Due to its higher solubility, it is an effective substitute for sodium carbonate, where 13 parts by weight of potassium carbonate are equivalent to 10 parts per weight of sodium carbonate, and will help to achieve warmer tones in paper development. When substituting potassium carbonate anhydrous for sodium carbonate monohydrate, multiply the amount of sodium carbonate monohydrate needed by 0.90.

This item is one bottle containing 1 lb of potassium carbonate anhydrous.

Ideal Substitute for Sodium Carbonate    Alkali Accelerator for Developers    Produces Warm Tones in Paper Development

Related Questions and Answers

Q: 1. Can this product be used for Lith developing?

A: Photographers' Formulary Potassium Bromide can be used as an ingredient for lith developer.

Q: 2. If these are steel, how is it possible that they "do not rust" if soaked?

A: The sand bag is filled with filled with steel buckshot that will not rust.

Q: 3. How tall is this when draped over a leg? Will it touch the ground if set on a 5.5" tall leg of a roller stand?

A: Unfortunately, a measure of this type is not published for the Matthews 25 lbs Shot Bag, as it would greatly depend on the exact roller stand that it is being used with.

Q: 4. if I get 100 grams Potassium Ferricyanide should I get 250 grams Ferric Ammonium Citrate to get proper soulution for cyanotype prints ?

A: This would be a proper mixture for cyanotype prints.

Q: 5. is the carbon black made from burning oil or is made from charcoal ?

A: Unfortunately the manufacturer does not specify this and could not provide any info as to which process was used to make this.

Q: 6. I have several fibre prints which are printed about half to one stop darker than I would like, can I use potassium ferricyanide as bleach to brighten them up a bit? What is the best dilution ratio? Is it still okay to selenium tone the prints after bleaching?

A: It is better to use a Farmer reducer for a whole print bleaching. And yes after the bleaching prints can be toned in celenium.

Q: 7. What country is it made in?

A: The Photographers' Formulary Tyvek Apron is made in China.

Q: 8. What's the particle size?

A: The folks at Photographers' Formulary say, "Our Carbon Black is very, very fine. It might be called an “air float” powder."

Q: 9. Do I need to mix with water? Does it comes in spray recipient?

A: The Photographers' Formulary Glycerin (100mL) needs to be diluted in water. Since this is a concentrated formula, the spray trigger cap is not provided with this bottle.

Q: 10. How many microns is the particle size? (Air float does not seem to have a distinct measurement)

A: I contacted Photographer's Formulary with your inquiry. They state that unfortunately, they do not have the particle micron size information available for this item. The only size indication they have is the "air float" description.