Answer:
Organic
Plate making
Ink mists
Gas, fumes and dust
Explanation:
the four categories commonly used to classify chemicals and chemical agents in the graphic communications industry are Organic ,Plate making ,Ink mists, Gas, fumes and dust.
Organic refer to those chemicals gotten from living matter and are natural.
Plate making refers to how plates are make and it carry image in the printing process.
Ink mist gotten from ink is use in graphic designs for painting and color indication.
B burning a piece of wood
Ash is a chemical substance not apparent before the chemical change,the fire burning the wood
Explanation:
Hydrochloric acid does not consider as organic acid because of the absence of carbon in it.
hope it helps
By their compound or element that they are made from
