SCREEN PRINTING FILM
These professional screen printing positives are silver halide photosensitive materials dedicated to screen printing plate making, matching mainstream red laser image setters. Built with anti-halation backing and stable polyester substrate, the film delivers ultra-high contrast, low base fog and steady dimensional flatness. It supports both room-temperature standard development and high-temperature fast processing, supplied in multiple standard roll widths with customizable packaging. Proper cool dry storage under dark green safelight ensures 15-month shelf life for stable pre-press output.
Screen Printing Positives
Professional screen printing positives are core silver halide photosensitive materials designed for screen printing plate making. Matched with mainstream helium-neon laser image setters, this film completes clear text, line and graphic scanning output for pre-press workflow. The integrated coating structure includes a rigid polyester base, rear anti-halation layer, front photosensitive emulsion and surface protective film, maintaining flatness and precise geometric size during all processing steps.
Core Imaging Performance of Screen Printing Positives
The film carries balanced photosensitivity paired with ultra-high contrast and maximum density. It eliminates fuzzy edges and incomplete pattern loss often seen on ordinary printing negatives. Uniform coating reduces light reflection during laser exposure, restoring tiny graphic details accurately for screen printing plate production.
Two processing modes are available to fit different workshop output volumes: standard room-temperature development for strict precision proofing, and high-temperature rapid processing to speed up mass production cycles.
Photographic Technical Indexes
| Performance Item | Standard Value |
|---|---|
| Photosensitivity (SD0+1.0) | 1.8±0.2 |
| Contrast Coefficient γ | ≥6.5 |
| Minimum Density Dmin | ≤0.05 |
| Maximum Density Dmax | ≥4.0 |
| Applicable Light Source Color Temperature | 2856K |
| Supported Laser Wavelength | 632.8nm, 670nm red laser typesetters |
Dual Standard Processing Parameters
| Processing Mode | Working Step | Temperature | Operation Time |
|---|---|---|---|
| Normal Temperature Process | Development | 20±0.5℃ | 5 min |
| Normal Temperature Process | Fixation | 20±0.5℃ | 5 min |
| High Temperature Fast Process | Development & Fixation | 30~36℃ | 30~35s |
| Post Process Drying | Drying | 45~50℃ | Adjustable |
All developing and fixing steps match general mainstream processing chemicals sold on the market, no special proprietary liquid required for stable image output.
Darkroom Operation & Long-Term Storage Rules
All film unpacking, sorting and processing operations must be carried out under dark green safelight to avoid light fog defects on unexposed emulsion.
Sealed film rolls need vertical storage in cool dry dark storage areas, lifted off the ground and far away from direct sunlight, radiation sources and corrosive volatile gases. Control storage temperature below 20°C and relative humidity within 65%RH maximum. Any leftover film after opening must be tightly resealed in original packaging. Standard shelf life reaches 15 months under qualified storage conditions.
Available Roll Widths & Custom Packaging
Full standard roll widths cover most daily screen printing plate making demands:
- 0.25m, 0.30m, 0.457m, 0.610m, 0.635m
- 0.66m, 0.71m, 0.838m, 0.914m, 0.95m
- 1.03m, 1.1m
Customized roll widths and packaging formats can be arranged according to clients’ production line equipment and order requirements.
Frequently Asked Questions
Q1: Why does this screen printing positives suit two different red laser wavelength typesetters?
A: The emulsion layer is tuned with high red-light sensitivity. It captures stable latent images under both 632.8nm and 670nm laser output, compatible with most mainstream pre-press laser imaging units on the market.
Q2: What risk will horizontal long-term stacking bring to unused screen printing positives?
A: Flat stacking creates sustained pressure on the emulsion surface, causing permanent indentation and uneven flatness. Vertical storage avoids extrusion damage and keeps consistent imaging quality for each roll.
Q3: Can high-temperature processing replace standard room-temperature development for high-precision fine-line screen printing?
A: High-temperature fast processing fits mass general patterns. For ultra-fine high-accuracy plate making, room-temperature development delivers more stable contrast and finer line restoration results.
