Discuss the different plastisol screen printing inks and curing methods on the market. Share tips on getting the best results with the different ink manufacturers.
hello t shirt people i am trying to do discharge printing with chlorine but each time i mix the chlorine with my thickener it reacts in to a very toxic gass then turn watery, can anybody help me with a solution as to why it behaves that way? thanks guys.
I wonder why not use the proper discharge agent which will be easier to handle then to use chlorine. It is much toxic and damaging to fabrics, it will deteriorate the fabrics if U did'nt prewash or regenerate the printed T.
A simple explanation may ease your doubts and hope can help U out to resolve the problems.
The thickener that incorporated into the print paste is from a synthetic base carboxylated polymer, the molecule will swell up and form a creamy paste at a pH of 7.5~8.5 with any alkaline solution. The disadvantage of such thickener is that it can easily break down when meets any electrolyte salts, such as the usual discharge agents ( Zinc Sulfoxylate Formaldehye, Amonium Sulphate, Amonium Chlorite or your Chlorine ), they are all highly electrolyted substances.
Any how not only chlorine but other discharge agents will have the same problems.
There are several ways which able to resolves the problem are, either add in more thickeners, try with other assisting agents such as cationic type of emulsifier 1~2% (Surfactants), increase pectrolium solvent like LAWS (Low Aromatic White Spirits or so call Hydrocarbon solvent).
Natural gum thickener do effectives but not having good levelling on the running properties. There are some newly formulate assisting modifier may help U out.
do not forget to soak your printed T's with
NT-chlorine agent such as Hydrogen Peroxide, bring along with U to the laundry shop for the final washing process and dry up.
I wonder why not use the correct discharge agent which will be easier to handle, it is much toxic then discharge agent, also very damaging to fabrics, it will deteriorate the fabrics if U did'nt prewash or regenerate the printed T.
A simple explanation and method may ease your doubts and hope can help U out to resolve the problems.
The thickener that incorporated into the print paste is from a synthetic base call carboxylated polymer, the molecule will swell up and form a creamy paste at a pH of 7.5~8.5 with any alkaline solution. The disadvantage of such thickener is that it can easily break down when meets any electrolyte salts, such as the usual discharge agents ( Zinc Sulfoxylate Formaldehye, Amonium Sulphate, Amonium Chlorite or Chlorine ), they are all highly electrolyted substances.
Any how not only chlorine but other discharge agents will have the same problems towards the discharge paste.
There are several ways which may help to resolve the problems are, either add in more thickeners not more then 1-2%, try with other assisting agents such as cationic type of emulsifier 1~2% (Surfactants), increase pectroleum solvent like LAWS (Low Aromatic White Spirits or so call Hydrocarbon solvent) to another 10-20%
if possible.
Natural gum thickener do effectives but not having good levelling on the running properties. There are some newly formulated assisting modifiers do help to stabilize the watery ink.
Do not forget to soak your printed T's with
NT-chlorine agent such as Hydrogen Peroxide, bring along with U to the laundry shop,add 5% into the washing machines for the final process.
thanks guys for all the effort on helping me out, i understand all your worries but cant do much cause of where i am based.
i am in cameroon in west africa and has very little acces to some of things you guys are enjoying out there, still will try to get the products. thanks again guys.
discharge printing inks 
