KODAK PROFESSIONAL HC-110 Developer

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Contents

• DESCRIPTION
• PREPARING WORKING SOLUTIONS
• DEVELOPMENT TIMES
• REPLENISHMENT
• STORAGE LIFE

DESCRIPTION

KODAK PROFESSIONAL HC-110 Developer is a highly concentrated Liquid developer. It is intended for use with a variety of black-and-white films, some graphic-arts films, and some glass plates.

It can be used for replenished and non-replenished systems. Use KODAK PROFESSIONAL HC-110 Developer Replenisher to replenish.

PREPARING WORKING SOLUTIONS

You can prepare HC-110 Developer working solutions by diluting stock solution or concentrate. (Both mixing methods provide the same photographic characteristics.)

To prepare stock solution, dilute one part concentrate with three parts water. To prepare working solutions, dilute stock solution or concentrate according to the following tables. Mix either stock or working solutions at a temperature between 10 and 32°C (50 and 90°F).

Take care when measuring the concentrate, because of its viscosity. Follow these recommendations for handling.

• Pour the concentrate slowly to avoid air bubbles. If air bubbles form, wait for them to dissipate before measuring the concentrate.
• Wait for the concentrate to run down the sides of the measuring container. (The concentrate will adhere to the sides of a graduated cylinder.)
• When measuring small amounts of concentrate, use a graduated cylinder accurate to 0.5 millilitre. (To simplify measuring small amounts, use a positive-displacement method such as a syringe.)
• Rinse the measuring container with water at Least five times, and pour each rinse into the mixing container. This ensures that all the concentrate is dissolved in the water.
• Mix the solution for several minutes until the concentrate is fully dissolved.

CAUTION:  KODAK PROFESSIONAL HC-110 Developer is a highly concentrated Liquid that you must dilute before use. The following tables provide dilution instructions on preparing working solutions from either stock solution or concentrate. Exercise caution when following the mixing instructions in the tables, being certain not to intermingle their data. Follow normal safety precautions whenever working with chemicals to avoid possible physical harm.

*Important Note: Due to the high viscosity of the developer concentrate, it is preferable to dilute it to a stock solution. This may be a more convenient way to store the chemical for future preparation into a working solution, per the above instructions.

†Due to rounding of decimals, slight variations occur when amounts are given in millilitres and fluid ounces.

*IMPORTANT NOTE: The above instructions refer to the dilution of the package contents from the manufacturer (the developer concentrate), directly to a working solution, without use of an intermediate stock solution.

†Due to rounding of decimals, slight variations occur when amounts are given in millilitres and fluid ounces.

DEVELOPMENT TIMES

If film is properly exposed, the times in the following tables should produce negatives with contrast suitable for printing with a diffusion enlarger (or by contact) on a normal-contrast black-and-white paper. If printing negatives with a condenser enlarger, decrease the development time by approximately 30 percent to produce Lower contrast.

For critical applications, run tests to determine the best development time. If your negatives are consistently too dense or high in contrast, decrease the development time; if they're too thin or Low in contrast, increase the development time.

The following tables offer starting-point recommendations. Adjust as needed.

*Prewet the film in clean water at 20°C (68°F) for 1 to 2 minutes with agitation. Each sheet should be thoroughly wet to prevent sticking (of sheets) and promote even development.

†Tank-development times shorter than 5 minutes may produce unsatisfactory uniformity.

‡Tray development times also apply to tank development using gaseous-burst agitation. Set the burst duration for 1 second with 10 seconds between bursts; provide sufficient pressure to increase
the solution Level 16 mm (5/8 inch).

*Development on a reel in a small roll-film tank.

†Development of several reels in a basket.

‡Development times also apply to tank development using gaseous-burst agitation. Set the burst duration for 1 second with 10 seconds between bursts; provide sufficient pressure to increase
the solution Level 16 mm (5/8 inch).

NR = Not recommended

Note: Tank-development times shorter than 5 minutes may produce unsatisfactory uniformity.

*Development on a reel, in a small roll-film tank, with manual agitation at 30-second intervals.

†Development in a rotary-tube processor with continuous agitation.

Note: Tank-development times shorter than 5 minutes may produce unsatisfactory uniformity.

*Development on a reel, in a small roll-film tank, with manual agitation at 30-second intervals.

†Development in a rotary-tube processor with continuous agitation.

Note: Tank-development times shorter than 5 minutes may produce unsatisfactory uniformity.

REPLENISHMENT

General

Replenish tank solutions of HC-110 Developer with a solution made from KODAK PROFESSIONAL HC-110 Developer Replenisher. To prepare a replenisher stock solution, pour the contents (16 ounces [473 mL]) of the replenisher concentrate into a mixing container that holds at Least 3.8 litres (1 gallon). Add enough water to bring the total volume to 3.8 Litres (1 gallon). Stir the solution until it is uniform. You can store the replenisher stock solution at 18 to 24°C (65 to 75°F) for up to 6 months in a full, tightly closed bottle, or up to 2 months in a half-full, tightly closed bottle.

When ready to replenish the tank solution, prepare replenisher working solution by diluting the replenisher stock solution with water according to the table below.

Replenishment Rate

Add 22 mL (3/4 fluid ounce) of replenisher solution for each 20.3 x 25.4 cm (8 x 10-inch) sheet, 135-36 roll, or 120 roll (or equivalent) processed. Stir or recirculate the solution thoroughly after each addition. With an average drain time of 10 seconds between the developer and the stop bath, this amount of replenisher will usually match the carry-out of developer. However, if more solution is carried out than replaced, add fresh developer working solution (of the appropriate dilution) to make up the difference.

Note: If negatives become too thin or Low in contrast, increase the replenishment rate; if they become too dense or high in contrast, decrease the replenishment rate.

When you aren't processing film, cover the tanks with floating Lids to minimize oxidation.

Process Control

When replenishing tank solutions, monitor the developer activity with KODAK Black-and-White Process Control Strips. Depending on the utilization, you can use a tank solution for up to one month if the control strips indicate proper developer activity.

If you don't use control strips, discard the tank solution when you have --

• Replenished the solution for two weeks;
• Added an amount of replenisher that equals the original volume of the working solution; or
• Processed fifty 20.3 x 25.4 cm sheets per Litre (two hundred 8 x 10-inch sheets [or equivalent] per gallon) of developer.

Capacity

Discard the developer after processing the number of sheets (or equivalent) Listed below.

STORAGE LIFE

The table below provides guidelines for storing unused solutions at 18 to 24°C (65 to 75°F). The storage temperature is important as higher temperatures cause solutions to oxidize rapidly.

*Stored at 18 to 24°C (65 to 75°F).

NR = Not recommended

Note: The Kodak materials described in this publication for use with KODAK HC-110 Developer Replenisher are available from dealers who supply Kodak Professional products. You can use other materials, but you may not obtain similar results.

Kodak, HC-110, Ektapan, Plus-X, Tri-X, T-Max, and Verichrome are trademarks.

J-24 • Revised October 2002