Everchase Industrial Ltd
Chemical supply since 1988


Product Highlights

  • Pre-conditioned and manufactured close to user's working conditions
  • High dimensional stability
  • Good resistance to film cleaners, monomers and thinners for liquid soldermask
  • Densotrans range of films are visually
  • transparent (amber) and provide high UV-density > 4.5
  • (X-Rate 369) and a low D-min. < 0.13
  • The nominal density just after development measured with a X-Rate 369 is > 4.5
  • The density readings after the first few exposures > 4.2

DPC-HCP Single matt, amber, high contrast for fast vacuum draw down.
Good solvent resistance.
For matt Soldermask surfaces and pattern exposure.
DPC-HRP Clear, amber, high contrast, less pigmentation.
Good solvent resistance.
For glossy Soldermask surface and pattern exposure.



Pre-conditioning Although all films are pre-conditioned it is highly recommended to stablise single sheets to ambient conditions for a few hours prior to exposure (Avoid exposure to UV-light and any chemical vapours such as ammonia).
Exposure Ensure contact of the photo master to DENSOTRANS® is emulsion to emulsion. Place and expose in a vacuum-frame with strong UV-light (Metal halide lamp) approximately for 40 seconds with 5kw light source with a distance of 80 cm. A Stouffer step-wedge can be used determine the correct exposure time.
Development DENSOTRANS® is developed in a ho, dry diazo machine with concentrated ammonia (25% resp. 24 Baume).
The film cannot be over developed, however we recommend two passes for complete and safe development.
To ensure utmost image accuracy allow 1 hour after processing, for the film to re-adjust to your working conditions.
Dimensional Stability Effects of temperature change: 1.7X10-5mm/m/oC. (PET base)
Effects of humidity change: 1.1X10-5mm/m/%rh. (PET base)
Storage Unexposed film can be stored in a conditioned environment and kept in its original packaging for approximately 12 months. High temperature and humidity may cause premature ageing.

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