Silberra RDN-LQ B&W Film Developer, 100ml concentrate

Description

Silberra RDN-LQ developer is a concentrated single-solution (one-shot) sharpness-enhancing film developer that works fine with most classical black-and-white panchromatic emulsions. Silberra RDN-LQ developer is a worthy replacement for classic AGFA developers. Very low concentration of alkali and developing agent in this developer increases contour sharpness of the print. It is also effective while working with thin layer emulsions.

Chemical Composition

Potassium metabisulfite, n-aminophenol, sodium hydroxide, potassium bromide, distilled water.

Preparing Stock Developer (mixing instructions)

Working solution is prepared by infusing the concentrate into distilled water, while actively stirring (use glass stick or special plastic stirring stick for chemicals). Dilute the concentrate of Silberra RDN-LQ to a ratio of 1:25 or, to controle the results better, 1:50.

Development Times

Average development time for photo films at stock dilution (1+25) is 6-7 minutes, and 10-12 minutes when diluted to a ratio of 1:50.
Optimal times to process specific films are stated either by manufacturer of the film or can be learned from the table of developing times at the foot of this page.

Usage Limits

Silberra RDN-LQ Developer working solution's effective usage limit is 3x135 type films per 1 litre. To process 1 film you should dilute at least 10 ml of the concentrate and use not less than 300 ml of the solution.
Silberra RDN-LQ stock developer is one-shot non-reusable developer and must be used within 1 hour after preparation.

Side Effects

SIlberra RDN-LQ Developer is not suitable for push and pull processing; it is not recommended to use this developer for films with expiring or expired date.

Storage

Keep Silberra RDN-LQ Developer in a cool, dry and dark place. Keep away from children. All the solutions must be stored in tightly sealed bottles, with low internal air volume.

Expiry Date / Shelf Life

Concentrated Silberra RDN-LQ Developer may be stored in original sealed bottle for up to 24 months. Please note that Silberra RDN-LQ working solution is non-reusable and must be used within 1 hour after preparation.

Disposal Regulations

Silberra developers and fixers must be disposed of in accordance with the rules and regulations of the country they are used in. Concentrated developers could be toxic and may harm the environment unless disposed in appropriate manner. Silberra recommends to use special disposal services provided by correspondingly licensed organizations which are eligible for photographic chemistry recycling/disposal.

Development Times Table