Conquer the dark side of polyester screen printing with Green Galaxy's Gamma Blocker Black HSA water based ink. This water based ink is specially formulated to stop dye migration in it's tracks when used as an under base under normal printing conditions. Unlike other carbon blockers in the galaxy, the super-refined consistency of Gamma Blocker Black creates a smooth under base for excellent print building. Print it through high mesh to lay down fine details, and build a foundation for award-winning prints that protect you in the fight against poly dye migration.
- Blocks dye migration from polyester and other sublimated materials.
- Super refined consistency creates optimal under base for building prints.
- Water based formula cleans up easily.
- Can be printed through fine mesh for high detail designs.
Ready-to-use water based ink for screen printing on fabrics. Can be printed on polyester or dye migrating fabrics with optional use of Green Galaxyª Warp Drive low cure catalyst.
Can be used with any mesh between 80-230.
We recommend using a water-resistant emulsion like Baselayr Complete. It is recommended to degrease your screens with Baselayr Emulsion Prep. For extended screen life and long print runs it is recommended to post expose the screens and/or use an emulsion hardener like Baselayr Emulsion Hardener.
Stir product prior to use. This product is intended to be used as-is, as mixing has the potential to reduce the blocking power of the product. It can, however, be mixed with Green Galaxyª Clear Core and Green Galaxyª Comet White HSA Water Based Ink.
Load screen with plenty of ink. Flood screen prior to printing. Green Galaxyª Gamma Blocker Black Ink can be printed with a push or pull squeegee stroke. If printing on an automatic, use a medium squeegee blade and medium squeegee pressure, two passes is typically recommend. After printing, flood screen allowing ink to sit on top of image to avoid drying. If screen clogs or exhibits dry ink in the print, re-flood and aggressively print again, this should clear the screen. If it does not clear the screen, spray a small amount of warm water into the stuck areas of the screen and wipe out with a rag. If you are leaving your screen for an extended period of time be sure to leave your screen flooded completely. If your ink begins to scale over, spray with water to rewet ink. Green Galaxyª Gamma Blocker Black Ink can be printed with other water based inks and with plastisol inks.
For flashing, forced air flash is optimal. Flash until dry to the touch.
Printed fabric should be cured for a minimum of 90 seconds at 360¡F. Ideally, printed fabric should be cured for three minutes at 300-320¡F. When curing with ovens that are smaller, we recommend the use of Green Galaxyª Warp Drive low cure additive to ensure a final cure is achieved after 48 hours.
For dye block testing: Print as directed and let the printed sample sit for 24 hours to check for migration. If dye migration persists, use two layers of Green Galaxyª Gamma Blocker or add Green Galaxyª Warp Drive catalyst and reduce cure temperature.
For cure testing: After printing, perform a stretch test to ensure elasticity. It is always recommended to perform a wash test to ensure proper cure prior to going into production. You may also run abrasion testing to watch for flaking and test adhesion. Increase cure dwell time if testing fails.
Ink should be removed from screen as soon as printing is completed. General wash-up (on ink that has not dried) can be done with water, though using Sgreenª Aqua Wash is much easier and recommended. For aggressive or dried screens, use Sgreenª Aqua Wash to dissolve ink and blast out areas of dried ink with water pressure.
Keep container(s) tightly closed. Store in cool, well-ventilated location that is locked.
General Safety Precautions:
Do not breathe vapors. Wear protective gloves. Do not eat, drink or smoke when using product. Wash hands thoroughly after handling. Dispose of this product in accordance with local, regional, national and international regulations as specified.
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