XPO-2848 Large Format Screen Exposure System

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XPO-2848 Large Format Screen Exposure System

Large Format Screen Exposure System Expose large format graphics and textile printing screen stencils with ultraviolet black lights. The Ranar Xpo-2848 over size screen exposure unit can handle (1) 28X48...

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Large Format Screen Exposure System

Expose large format graphics and textile printing screen stencils with ultraviolet black lights. The Ranar Xpo-2848 over size screen exposure unit can handle (1) 28X48 inch, (1) 23X31 or (2) 20 X 24 inch screen printing frames. Burn high resolution silk screening images using: 8 (40 watt) ultraviolet fluorescent black light bulbs that have 320 nanometers each. Use an automatic digital programmable timer to repeat accurate exposure times. With a flip of a switch you can run in manual or automatic mode.

Screen Printing Safe Lights-Darkroom Equipment

No need to rush when positioning films in the darkroom prior to exposing emulsion with our yellow UV safe viewing lights. Do to the ultraviolet light sensitive nature of screen printing emulsions; just a few seconds of UV light can ruin a screen stencil as UV light hardens emulsions to solid.

Options :

  • 8-40 watt UV black lights -Fast exposure times
  • Large format-28 x 48 inch
  • Ultraviolet safe lights -Emulsion safe
  • Digital timer -Accurate exposure times
  • Manual or automatic mode
  • Neoprene rubber blanket -Fabric reinforced to resist tears
  • Vacuum motor -Fast draw down
  • Heavy Duty Vacuum Frame
  • Frame sizes 1-28x48" 1-23x31" or 2-20x24"

The XPO-series screen printing exposure units, designed for startup t-shirt printing shops on a budget. There are three models, XPO-2426, XPO-2331, and the XPO-2848. Expose or burn images onto photo emulsions with high output UV Fluorescent lights, with accurate detail. Produce multi-color silk screen printed designs with fine lines or halftones used in four color process with quality film positives. Exposing dual cure, diazo and photopolymers emulsions, plus capillary films are easily done. All of these are commonly used in the textile, graphics, and ad specialty printing industries.

The Ranar XPO-series screen exposure units have a rigid tubular frame with holes in sides where the vacuum draws air from the exposure area. This vacuum frame has a rubber blanket that raises and lowers with gas shocks for easy access. A fast vacuum draws down the neoprene rubber blanket to the clear glass and creates perfect contact between your film positive and screen for clean crisp resolution. An accurate programmable digital timer controls exposure times. We use energy efficient electronic ballasts and unfiltered ultraviolet black light bulbs with 320 nanometers in our screen exposure units. With a flip of a switch the vacuum and ultraviolet lights can be used manually or automatically.

Screen Coating & Exposure Tips

After properly prepping the screen mesh and drying it, use an aluminum scoop coater to apply an even coat of liquid emulsion which is light sensitive.

This must be done in a dark room or with subdued light. The use of a yellow or red light is helpful. Store your screen frame in a dark dry location prior to use as not to expose the emulsion to light.

Before using, have your art ready to go on the screen exposure unit. Place the film positive (make sure you have dark film positive) on the glass at the desired location. Then lower the screen frame on top. Set the timer and start the exposing of your design. The black lights will cure the areas except where the art is. The design blocks the light and prevents the emulsion from hardening.

Typical exposure times to be expected with photopolymer emulsion:
Block letters 1.5 minutes,
Halftones 30-50 seconds

Once you have exposed the emulsion you need to rinse out the unexposed emulsion. Wash out your design using a pressure nozzle and water. Be careful not to wash out your design. A washout booth with back lighting is helpful in this case. Note: do not rinse screen in the sun or direct light as it will harden your design and will not wash out.

Ranar makes its own professional screen exposures units in the USA to insure quality. The entry level XPO-2426 with (8) 20 watt bulbs is perfect for the small silk screening shop using standard 20"x 24" screen frames for manual screen printing presses. The XPO-2331 with (10) 20 watt bulbs can handle a 23"x 31" inch frame which is standard on automatic screen printing presses. The extra large XPO-2848 with (8) 40 watts bulbs can handle (2) 20"x 24" or (1) 23"x 31" or (1) large over size screen frame 28"x 48" used for all overprints and textile printing.

Vacuum Screen Exposure Unit Features :

  • Black light fluorescent bulbs (320 nanometers)
  • Adjustable Exposure times
  • Digital timer
  • Auto shut off
  • Instant Draw Down Vacuum
  • Neoprene Rubber Vacuum Blanket (fabric on one side for durability)
  • Gas Shock Assisted vacuum frame
  • Manual/Auto Mode
  • Instant Start Electronic Ballast
  • Energy efficient
  • 1 yr warranty parts only (Excludes Blanket & Glass)
  • Made in the USA.

Screen Drying Cabinet & Exposure System

These screen exposure units can be purchased as stand alone or with screen drying cabinet below to complete pre-press screen room. Screen drying cabinets serve a specific purpose in any screen printing shops production. They are used to store emulsified screen frames in a dark warm air heated, dust free environment to speed the dry time with less pin holes.

Crating Charges for Exposure Units  
Basic Exposure Unit 120v $25.00
CBX Boxed $35.00
CBX Boxed w/ skid $75.00
XPO-2426 / 2332 Caged w/ skid for Domestic $165.00
XPO-2426 / 2332 Export Full Wooden Crate $225.00
XPO-2848 Caged w/ skid for Domestic $185.00
XPO-2848 Export Full Wooden Crate $250.00

Click here to download Owners Manual [PDF file]

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