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Fixation by Steaming

Steam is necessary for fixation of G & S Procion 'H' Dye. Dry heat will not work for the Procion "H" dye, nor will a steam iron. The dyes require an enclosed volume of steam to induce the chemical reaction necessary to bond the dye to the fibre. Steaming treatments are carried out at 100 degrees Celsius (212oF).

In the steam environment, the printed or dyed areas absorb moisture and form a concentrated dye bath from which the dying of the fibre takes place. The function of the resist or thickener is to localize the dye, both in production aspects and here in the fixation. It prevents bleeding. The steam should be free to move around and in abundant supply. When the steam is too moist there is a possibility of bleeding. Too long a steaming will also result in colour transferring through the newsprint. If the steam is too dry, the lack of moisture retards the dyes from setting properly. Slight air-contamination is not dangerous, however, a rush of cold air may create condensation which drips on the fabric.

A) Roll up the painted silk for steaming in unprinted newsprint. Double up paper for dark colours.

B) After rolling, seal with tape.
C) Then fold and tie package.
D) Now complete as shown.

After Wash

Washout after steaming is necessary to remove any excess dye which has not chemically bonded. This does not deplete the colour intensity that was first applied, it is simply excess, and the first wash-out is very important.

Wash the steamed fabric in a container with continuous running cold water. Continually flush with fresh water until the fabric is rinsing clear. Bring the water temperature up to warm, add TNA Soap and wash by hand or in a washing machine. Run through a full cycle to complete the crucial after-wash. If the silk fabric contains a fair amount of light areas, use the TNA Soap during the complete rinsing stage. This protects the fabric from loose particles of dyes.

Use a capful of white vinegar in the final rinse to condition the silk and to aid in ironing. Silk is best ironed wet with a warm iron.

G&S Dye - Steaming {date}