July '20

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Snell suggests those involved in moisture- producing disciplines consider the airflow on their extractor machines. "There are two schools of thought in fume extractors; there are those where the air comes in at the top and out at the bottom, and those where air comes in at the bottom and out at the top," he explains. He suggests reverse airflow ma- chines to manage the moisture and avoid any excess water getting into the fume ex- tractor for processes like sublimation and wood engraving. In addition to machine construction and application-specific filters, Baird urges producers to pay close attention to the con- struction of the filters they use. Since many fume extractors have a prefilter for large particulates, a HEPA filter for finer particu- lates, and a carbon filter for chemicals, "… it's important that all three filters are sepa- rate and their construction needs rigidity," he contends. Baird suggests that an all-in-one filter may seem like a convenient option at first but can cost more over time if it's not built to last. With some filters, he adds, like those made with cardboard construction, there's the potential for leakage in the prefilter as the machine's blower ramps up, which can, in turn, contaminate the HEPA filter. Tight weaves on the filter to capture more partic- ulates as well as sturdy, aluminum frames, and filter classifications between F8 and F9 are some key components to look for, he states. WHERE AND HOW TO SET UP Since extractors tend to generate noise, shops should position the machine, particu- larly in conjunction with a laser, in a spot that won't be disruptive to front-facing parts of the business like a customer service or or- der pickup area. "Even a high-quality laser with a high-quality fume extractor can be a bit of a challenge to talk over," Snell says. Generally, producers should try to position both units near the back of the shop. Many extractors feature an onboard indicator so users know when it's time to change out the filter. Producers can consult with manufacturers on the substrates they're cutting and printing to ensure they're using the correct filtration in their machines. (Images courtesy BOFA) Shops should consider companies who offer a range of filters and extractor sizes, since many businesses expand and grow their product line. (Image courtesy BOFA) 4 6 G R A P H I C S P R O J U L Y 2 0 2 0 G R A P H I C S - P R O. C O M Choosing the right fume extractor depends on factors such as production output and materials a shop is working with. (Image courtesy Purex Fume Extraction by BSE)

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