Curing Upgrades Boost Output, Quality for Growing Screen Printer

WILMINGTON, DE — Robert Merrill's screen-printing business, Cornerstone Printing Co., was born of his interest in skateboarding and skateboarding apparel.

In the early days, Merrill sought help from two friends, Josh Balick and Pete Furman, who run the Wilmington screen printing business, Other Industries. "They took me under their wing and gave me a crash course in all the necessities for screen printing," he says.

He began with an inexpensive 6-color/4-station press to print T-shirts for local businesses, focusing on one- and two-color jobs with intricate designs and strong graphics. His attention to detail soon garnered the attention of family-owned businesses in the community.

Flash curing adds needed control

He further improved quality through upgrades in curing of prints. Merrill first relied on a heat gun to flash shirts between colors and a heat press for the final cure, but both processes were time-consuming and unreliable. "Initially, I was spending 60 to 90 seconds flashing each shirt with the heat gun," he says. "I would hover over the shirt and follow the ink lines at a distance of three inches for a few seconds in each area. If I held it too close or in one place for too long, it would burn the shirts."

Neither did the heat gun work well on all fabrics. "Switching to polyester required a change in temperature, but the heat gun wasn't adjustable," says Merrill. "This caused the T-shirts to shrink a little and fall out of registration when applying a secondary coat of ink."

To improve quality and production speed, Merrill purchased an 18 X 24 in. (46 X 61 cm) RedFlash™ flash cure unit manufactured by Vastex, providing the adjustability and consistency needed to prevent scorching, uneven drying and associated rejects.

By pressing a foot pedal, the unit's AutoFlash™ option swings the infrared heater above the printed image, and swings it away once the pre-set dwell time has elapsed, preventing over- or under-flashing of garments.

Conveyor drying boosts output, consistency

Merrill first relied on a heat press for the final curing of ink but inconsistent temperatures affected the quality and appearance of prints. "The ink dried thick and heavy on the shirts and looked wrinkled after one or two washes — similar to a heat transfer vinyl," he recounts.

The turning point came when he had a problem with an order for 250 shirts from a local plumbing company. "The front-left chest area washed out because the ink hadn't cured properly," says Merrill. "That was the first time I lost a customer, and made me realize I needed a conveyor dryer."

He then purchased a LittleRed™ X1 infrared conveyor dryer, also from Vastex, with a 30 in. (76 cm) wide belt, which doubled his output. "I'm able to feed garments at a rapid pace, allowing me to dry 150 single-color shirts in about four hours versus all night previously."

Over- or under-curing is prevented by virtue of temperature accuracy to +/-1°F, consistency of the adjustable belt speed, and adjustability of belt-to-heater height to compensate for sweatshirts and other bulky items.

"The ability to reposition the heating chamber on the conveyor belt makes it easy to create more space at the end of it, which extends the cool-down period after curing," Merrill says, adding, "This helps to prevent shirts from sticking together when they exit the conveyor belt and collect in a bin."

Dryer leaves indelible impression

Merrill says since he started using the conveyor dryer, his customers have noticed an improvement in the look and feel of the finished product, and his business has grown through repeat business and word-of-mouth referrals.

His tattoo of the dryer sums up his enthusiasm: "The LittleRed® has saved me so much time and energy that I had to dedicate a leg to it," he laughs.

Coming full circle, he recently printed shirts for a startup skateboarding magazine to promote the publication. "I want to be there for everyone in my life who's trying to achieve something and help them get the recognition they deserve," he says.

Going forward, Merrill hopes to expand into a full-service print shop. He is also interested in starting another clothing line for the snowboarding and skateboarding community in the Tri-State area. But his immediate plan is to replace his current press with a Vastex V2000 8-color/4-station manual press. Meanwhile he subcontracts eight-color work and large orders to Josh and Pete at Other Industries.


Curing Upgrades Boost Output, Quality for Growing Screen Printer

Curing Upgrades Boost Output, Quality for Growing Screen Printer

Curing Upgrades Boost Output, Quality for Growing Screen Printer

Robert Merrill flashes ink between colors on his 6-color/4-station press using a RedFlash™ flash cure unit.

Curing Upgrades Boost Output, Quality for Growing Screen Printer

Foreground: Cornerstone's infrared conveyor dryer and flash cure unit, both 30 in. (76 cm) wide.

Curing Upgrades Boost Output, Quality for Growing Screen Printer

Cornerstone multiplied capacity by converting from heat press curing to infrared conveyor curing

Curing Upgrades Boost Output, Quality for Growing Screen Printer

Robert Merrill's conveyor dryer tattoo sums up his enthusiasm.