|
Stripping Colour With Thiourea Dioxide Instructions
|
|
General Information...
Thiourea Dioxide is used to remove colour from natural fibers that have been dyed with Procion MX or Procion H dyes. Results are best if used with simmering water, but
Thiourea Dioxide is an excellent colour reducer when used with hot tap water. It may also be added to print pastes for discharge dyeing.
Safety...
Wear an approved vapour/fume respirator, rubber gloves and safety goggles while handling powder and liquid. Never use in combination
with bleach or detergents containing chlorine bleach as toxic fumes may be produced. Do not use in or with cast iron, aluminum, or copper pots or utensils.
|
|
Stripping Colour From Cellulose Fibers
(Top Of Stove Method)
1 - Use 8 L (2 gal) hot water.
2 - Add 10 gr. (2 1/2 tsp.) Thiourea Dioxide, stir to dissolve.
3 - Add 15 gr. (1 Tbs.) Sodium Carbonate, stir to dissolve.
4 - Add 5 ml (1 tsp.) TNA Detergent.
5 - Add 1 LB. dry fiber, stir 1 minute.
6 - Heat rapidly to 200º - 212º F, stirring frequently for 20 minutes.
7 - Rinse well in warm water.
8 - Add 125 ml (1/4 cup) white vinegar to final rinse.
|
|
Removing Most Of The Colour By Hand
(For 1 LB. Of Cotton, Linen Or Rayon)
1 - Use 8 L (2 gal) hottest tap water.
2 - Add 10 gr. (2 1/2 tsp.) Thiourea Dioxide, stir to dissolve.
3 - Add 15 gr. (1 Tbs.) Sodium Carbonate, stir to dissolve.
4 - Add 5 ml (1 tsp.) TNA Detergent.
5 - Add fiber and stir frequently for 30 minutes.
6 - Rinse well in warm water.
7 - Add 125 ml (1/4 cup) white vinegar to final rinse.
|
|
Removing Most Of The Colour In A Washing Machine
(For 8 lb. Of Cotton, Linen Or Rayon)
1 - Use hottest water, fill machine.
2 - Add 10 gr. (2 1/2 tsp.) Thiourea Dioxide.
3 - Add 60 gr. (1/2 cup) Sodium Carbonate.
4 - Add 45 ml (3 Tbs.) TNA Detergent and agitate machine to dissolve.
5 - Add fabric and run machine on wash cycle for 30 minutes - reset the machine so it will not empty.
6 - Rinse well in warm water.
7 - Add 275 ml (3/4 cup) of white vinegar to the final rinse.
|
|
Stripping Colour From Protein Fibers
(Top Of Stove Method)
1 - Use 8 L (2 gal) hot water.
2 - Add 10 gr. (2 1/2 tsp.) Thiourea Dioxide, stir to dissolve.
3 - Add 5 gr. (1 tsp.) Sodium Carbonate, stir to dissolve.
4 - Add 5 ml (1 tsp.) TNA Detergent.
5 - Add 1 lb. dry fiber, stir 1 minute.
6 - Heat to 180º F for silk, 200º F for wool. Stir frequently for 20 minutes.
7 - Rinse in warm water and add 125 ml (1/4 cup) of white vinegar
immediately after stripping. Continue to rinse well.
|
|
Discharge Printing Of Cellulose Fibers
(For 1 Cup Of Discharge Paste)
1 - Use a non-reactive container.
2 - Add 2 gr. (1/4 tsp. ) of Thiourea Dioxide.
3 - Add 3 gr. (1/2 tsp. ) of Sodium Carbonate.
4 - Add 2 gr. (1/4 tsp.) of pure water softener.
5 - Add 6 gr. (11/2 tsp. ) of Sodium Alginate.
6 - Add water to make 1 cup, stir well, leave for several hours to allow the Alginate to become a smooth paste.
7 - Apply paste to fabric, let dry.
8 - Wrap and steam fix for 30 minutes over boiling water.
9 - Rinse well.
|
|
Click here to locate Thiourea Dioxide in our Catalogue
|
|
To Top
|
Back To Instruction Main Page
|
