END RUN Print Brightening Converter
END RUN Print Brightening Converter changes the invisible ultra-violet (UV) light reflected from a prints surface into visible white light, increasing the total visible reflectance and brilliance of the print’s whites without bleaching.
The same brightening agent is incorporated in some printing papers, but can be lost during processing and washing. END RUN Print Brightening Converter adds to or replaces these built-in brighteners after the final wash.
Print brightening can increase the archival permanence of prints by shielding them from UV light, which might otherwise cause image and paper deterioration. Print brightening will make some warmtone papers appear cooler in color.
How to Mix
END RUN Print Brightening Converter should be used as an additive to END RUN Wetting Agent & Stabilizer.
Dilute END RUN Wetting Agent & Stabilizer superconcentrate 1:99 with water as directed by instructions for using END RUN Wetting Agent & Stabilizer. To each liter of Wetting Agent working solution, add 1-50 ml END RUN Print Brightening Converter concentrate.
|>10ml END RUN Wetting Agent Superconcentrate|
|20ml||END RUN Print Brightening Converter Concentrate|
|=||1020ml||END RUN Print Brightening Converter Working Solution|
The visible effect of brightening varies with the type of paper, water quality, processing methods, and the amount of UV available for reflection in the viewing light source. To compensate for these factors, the strength of the Print Brightening working solution may be adjusted by changing the amount of END RUN Print Brightening Converter concentrate added per liter of END RUN Wetting Agent working solution.
- For fiber-based prints, add 1-20 ml Converter per liter.
- For RC prints, add 10-50 ml Converter per liter.
- For some processes, especially non-silver printing on hand-sensitized paper, Print Brightening Converter concentrate may be added to plain water instead of END RUN Wetting Agent working solution. Add 1-20 ml per liter of water. It is good practice to use distilled or deionized water.
- Excess Print Brightener may be removed gradually by water washing.
How to Use
After the Final Water Wash, immerse for 1-3 minutes with constant agitation, following the procedure in the instructions for END RUN Wetting Agent & Stabilizer. Sponge squeegee and dry as usual.
|1||Final Water Wash||5 minutes||1-10 minutes|
|2||END RUN Print Brightening Converter||1 minute||1-3 minutes|
|3||Sponge & Dry|
Use at the same temperature as other solutions in the process, 18-30°C / 64.5-86°F. Agitate continuously for the first minute in working solution, and then for 10-15 seconds of each minute.