DISCHARGING AGENT FOR TEXTILE PRINTING AND DYE STRIPPING ADDITIVE |
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AVCO-CHARGE RED is a stabilized sulfinate derivative, used as a discharging agent for printing textile fabrics pre-dyed with suitable dischargeable dyes. SPECIFICATIONS:
PROPERTIES & USES: 1. AVCO-CHARGE RED is de-colorizing and producing white prints on wool, silk, polyester, polyamide, poly-acrylonitrile and cellulose fabrics pre-dyed with suitable dischargeable dyes. 2. AVCO-CHARGE RED is recommended for colour printing with suitable resistant dyestuffs on various types of natural and synthetic fabrics pre-dyed with dischargeable dyes. 3. AVCO-CHARGE RED can be used for discharge printing with AVCO-LOR pigments on dischargeable reactive dyes by the dry hot or by the steaming fixation methods. 4. AVCO-CHARGE RED is recommended for stripping off dyes from wool, polyamide and acetate. APPLICATION: PIGMENT PRINTING ON DISCHARGEABLE REACTIVE GROUNDS 1. AVCO-CHARGE RED should be applied with thickeners, binders and pigments which are resistant to heavy metals and reductive agents. When adding AVCO-CHARGE RED to the thickener paste the viscosity may increase or decrease. 2. Printing pastes containing AVCO-CHARGE RED should be used within the day of its preparation. 3. Exact application instructions, for white and colored discharge printing with AVCO-LOR pigments on cellulose fabrics are explained in the technical bulletin of AVCO-PRINT DIS. 4. After printing with AVCO-CHARGE RED rinse the printed fabrics with water, to avoid unpleasant smell from the product residues. STRIPPING-OFF FAULTY DYEING FROM WOOL
Formic acid 1 – 2 g/l (adjust to pH 3.5 – 4.5) AVCOL PAM 1 – 3 g/l AVCO-RON HWF 1 – 2 g/l AVCO-CHARGE RED 2 – 5 g/l Treat for 30 -45 minutes at 80 – 95 C. Rinse immediately with warm water. STRIPPING-OFF FAULTY DYEING FROM POLYAMIDE First step is a reductive alkaline treatment: AVCOL PAM 2 – 4 g/l Soda caustic (50%) 8 – 10 cc/l AVCO-CLEAN HT 5 – 7 g/l Treat at the boil for 45 minutes and rinse. Continue with a reductive acid treatment: Formic acid 1 – 2 g/l (adjust to pH 3.5 – 4 ) AVCOL PAM 1 – 2 g/l AVCO-CHARGE RED 2 – 5 g/l Treat at the boil for 30 – 45 minutes and rinse well. |