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CHEMICALS: BER-01 BLEU

Introduction
Liquid developer for neutral to cold tones with following papers : BERGGER PRESTIGE CB ART ; PRESTIGE VARIABLE CB ; CM ; V.CB STYLE ; and cold to blue tones with PRESTIGE NB ART, NM, and VARIABLE NB
Main ingrediants : Hydroquinone and Phenidone

Instructions for use
More concentrated dilutions of developer will produce colder tones.
For example :
With 1+20 dilution and 3 minutes at 20°C (68°F), will produce cold tones depending on the papers used
With 1+10 dilution and 3 minutes at 20°C (68°F), will produce colder tones (black-blue) with D-max = 2.3 depending on the paper used.
You can also get good results with the following two-bath development:
1) Dilution 1+7. Time : 20 to 40 seconds
2) Dilution 1+30. Time : 3 minutes

Durability of working solution
After first use, 1+10 working solution can be used for 2 days in open tray and 2 months in a sealed bottle.

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