I have a project that I am trying to achieve a certain garment treatment. I am attaching an image of the design. I have tried using bleach on a black garment but end up with an orange under-color and my client is looking to get it as close to white as possible – see picture. Do you have any other treatment suggestions on how to achieve this look?
Your picture of the desired results [shown to the right] appears to show the use of an opaque white screen-printing ink. The white is so bright and so devoid of variation that it doesn’t have the look of bleached-out dye, to me.
Discharging black garments is a perennial problem. Most commercially-available black garments are dyed with unidentified dyes that will discharge unpredictably.
Unless a shirt is sold with specific claims as to dischargeability, you never know whether it will discharge to white, or to an aged-looking orange or brown, or even refuse to discharge at all, remaining black. Some dyes cannot be discharged at all. Black garments may have been originally intended to be black, or they may have been overdyed with black dye after dyeing with another color produced undesirable results; if the other colors are non-dischargeable, you could get an entirely unpredictable color. A supply of black blanks may discharge well and then suddenly, after many successful uses, be replaced, with absolutely no notice from the manufacturer, by black shirts that do not discharge acceptably!
To complicate matters, while results will be pretty much the same with one reducing-type discharge as another, the results may be very different from those obtained by discharging with an oxidative discharge such as chlorine bleach or dichloroisocyanurate. Bleach may produce an entirely different color than a reductive discharge. For more information on this, see my page, “What chemicals can be used to remove dye?”. If you ever use Procion dyes yourself before discharging, also check out my page “Which Procion MX dyes discharge the best? Which are good at resisting chlorine bleach?”.
I recommend that you search specifically for a dischargeable black blank t-shirt for dyeing. There are some on the market. Ask your current suppliers if they can supply you with some, or do a search including the word “dischargeable” to locate another supplier. Alternatively, consider the use of an opaque white screenprinting ink. For example, Jacquard Professional Screenprinting Ink in the color “Super Opaque White” gets good reviews for being very opaque, though I don’t have personal experience with it.
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