Printwear

November '19

For the Business of Apparel Decorating

Issue link: https://nbm.uberflip.com/i/1177508

Contents of this Issue

Navigation

Page 59 of 68

2 0 1 9 N O V E M B E R P R I N T W E A R 5 7 6. NOT USING A DEDICATED CIRCUIT BREAKER We want to be certain that we are using not only a dedi- cated circuit breaker but one that is rated for the correct amperage of our flash. Flash-cure units are resistance heaters, which means they create heat by power/amper- age moving through the heating element. If the outlet you have plugged your flash into does not have enough amperage, the odds are it will not trip the breaker, but just won't get up to full temperature. This can magnify any of the other variables in the curing environment as we are not utilizing the full thermal output of our flash. Also, if we are using a circuit breaker that has other outlets in use for other devices, it can occasionally trip the breaker, which will stop production or, worse yet, starve your flash cure for amperage causing the tem- perature to drop for a few shirts, while the other device is in use. Common problems: Variances or inconsistency in the time it takes to get a printed image up to full-cure temperature or intermittent curing problems. 7. NOT USING A TEMP GUN AND TIMER We want to use both a temp gun and a timer to mini- mize the variances in curing. By monitoring time and temp, we are mimicking a conveyor dryer by attempt- ing to control these variables. For a standard output flash cure, a 30 second-plus dwell time under the flash is recommended, with a cure temp between 340–360 degrees F for printing on 100% cotton and 50/50 blends. Common problems: Intermittent or consistent cur- ing problems or images fade or wash out. By eliminating these seven deadly sins, we minimize as many variables from the curing process as possible using a flash. We attempt to mimic the control of vari- ables like we do when we use a conveyor dryer, thus maximizing your chances to consistently achieve a full cure using a flash to cure plastisol ink. PW Brian Toney is a 33-year veteran in screen printing technical sales and support. During that time, he's had the privilege to serve as a Senior Acct Executive at Advance Process, President of Freedom Imaging Solutions and cur- rently as a partner along with his wife Tanya at Kolormatrix Technical Training Center and Supply in Atlanta, Ga. We can mimic a dryer setting by monitoring the time and temp with a heat gun.

Articles in this issue

view archives of Printwear - November '19