Impressions - September 2017 - 33

light sources) or dynamic (maskless direct-light exposure) systems.
Multipoint: Also available in static or dynamic configurations, multipoint light sources use multiple florescent tubes or arrays of LEDs
matching the screen's width and length when provided in a static
configuration. Or they match only the screen's width when provided
in a dynamic configuration. While multipoint light sources typically
provide better light uniformity than single-point systems, light scatters more than with single-point systems, causing light undercutting
of the artwork.

LED Emulsion Curing
LED systems come in many styles and configurations, and are available in each of the four aforementioned categories. They generally
offer the following:
* Exposure speeds that match those of high-wattage, metal-halide
systems (primarily with SBQ emulsions) and surpass those of
all low-wattage light sources
* Low power consumption
* Much longer bulb life than metal-halide bulbs
* More efficiency, producing much less heat
Exposure rooms and vacuum-frame glass remain cooler, which
helps maintain the dimensional stability of film positives, and prevents films and emulsions from sticking to the glass. Unlike the broad
spectrum of UV light that metal-halide bulbs emit, LEDs emit a

Exposure Latitude
Exposure latitude relates to an emulsion's
tolerance for longer or shorter-than-optimum
UV exposure duration and varies considerably
among the four emulsion types. Those with wide
exposure latitude, as exhibited by diazophotopolymer and diazo emulsions, provide
greater processing latitude.
Fast-exposing SBQ emulsions exhibit narrow
exposure latitude, thus requiring tighter
control of coating thickness, which affects
proper exposure time proportionally.
There is a significant difference in exposure
speed between SBQ and diazo-style emulsions.
Keep in mind that what is gained in speed is
lost in exposure latitude and, often, resolution and resistance.

SEPTEMBER 2017

P.33



Table of Contents for the Digital Edition of Impressions - September 2017

Impressions - September 2017
Contents
First Impressions
From the Show Director
Overheard
First Look
Scene at ISS
On Design
High-Flying Outerwear Embroidery
Cut From the Same Cloth
Screen Making in a New Era
Shop Talk
Embroidery Design & Digitizing
Sublimation
Direct-To-Garment
Ad Index/Online Directory
Classifieds
Impressions - September 2017 - CT1
Impressions - September 2017 - CT2
Impressions - September 2017 - Impressions - September 2017
Impressions - September 2017 - Cover2
Impressions - September 2017 - 1
Impressions - September 2017 - Contents
Impressions - September 2017 - 3
Impressions - September 2017 - 4
Impressions - September 2017 - 5
Impressions - September 2017 - First Impressions
Impressions - September 2017 - 7
Impressions - September 2017 - From the Show Director
Impressions - September 2017 - 9
Impressions - September 2017 - Overheard
Impressions - September 2017 - 11
Impressions - September 2017 - 12
Impressions - September 2017 - 13
Impressions - September 2017 - 14
Impressions - September 2017 - 15
Impressions - September 2017 - 15a
Impressions - September 2017 - 15b
Impressions - September 2017 - First Look
Impressions - September 2017 - 17
Impressions - September 2017 - 18
Impressions - September 2017 - Scene at ISS
Impressions - September 2017 - On Design
Impressions - September 2017 - 21
Impressions - September 2017 - High-Flying Outerwear Embroidery
Impressions - September 2017 - 23
Impressions - September 2017 - 24
Impressions - September 2017 - 25
Impressions - September 2017 - 26
Impressions - September 2017 - 27
Impressions - September 2017 - Cut From the Same Cloth
Impressions - September 2017 - 29
Impressions - September 2017 - 30
Impressions - September 2017 - 31
Impressions - September 2017 - Screen Making in a New Era
Impressions - September 2017 - 33
Impressions - September 2017 - 34
Impressions - September 2017 - 35
Impressions - September 2017 - 36
Impressions - September 2017 - Shop Talk
Impressions - September 2017 - 38
Impressions - September 2017 - Embroidery Design & Digitizing
Impressions - September 2017 - 40
Impressions - September 2017 - 41
Impressions - September 2017 - Sublimation
Impressions - September 2017 - 43
Impressions - September 2017 - 44
Impressions - September 2017 - 45
Impressions - September 2017 - Direct-To-Garment
Impressions - September 2017 - 47
Impressions - September 2017 - 48
Impressions - September 2017 - 49
Impressions - September 2017 - Ad Index/Online Directory
Impressions - September 2017 - Classifieds
Impressions - September 2017 - 52
Impressions - September 2017 - Cover3
Impressions - September 2017 - Cover4
Impressions - September 2017 - IO1
Impressions - September 2017 - IO2
Impressions - September 2017 - IO3
Impressions - September 2017 - IO4
Impressions - September 2017 - IO5
Impressions - September 2017 - IO6
Impressions - September 2017 - IF1
Impressions - September 2017 - IF2
Impressions - September 2017 - IF3
Impressions - September 2017 - IF4
Impressions - September 2017 - IF5
Impressions - September 2017 - IF6
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