Photography Tips The Printing Paper

Photography Tips The Printing Paper

Here the situation is complex because there are many models on the market, in several sizes: 10 × 15, 13 × 18, 18 × 24, 24 × 30, 30 × 40, 40 × 50. They can be polietinate (are covered by an impermeable layer that facilitates the process of development, to make the most of tones and gloss but require washing times, 10 times higher than other cards) or baryta (no waterproof cover), a fixed gradation (not filters are used to change the contrast adjusts the paper) or multigrade (filters are used to change the contrast), smooth or rough, of various brands (the survivors).

As can be seen from the diagram of the left, is composed of a light bulb (60W or 150W), a mirror and a lens (light condenser) which allow to diffuse the light uniformly on negative positioned immediately below the metal structure that contains objects listed first Below the negative there is a sort of “bellows” to focus on the rod while vertical, moving the metal structure, we can enlarge or reduce the image. Under the lens focus, there is a red filter: this is used during the calibration phase and prevents that during the placing of the enlarger paper, placed at the bottom, is impressions.

A good magnifying normally must be stable, the vertical movement must be fluid as well as the mechanism of focus. Lighting should be really smooth (you can try it without a negative or a negative totally black to see if there are “losses” of light. Finally, the negative carrier must place the negative without glasses or other protective surfaces (not to increase defects).

Eye also to the objective lens of the enlarger: check that it is quality and with good brightness. Normally, for a picture of small dimensions, is used with a 50mm f / 2.8 or f / 4. If you can not find it with the magnifier, the case is then to buy it separately.

Contrast filters. These filters should always be used with the enlarger, serve to vary, as the name implies, the contrast of the final picture. Normally there is a drawer in which to arrange them, the lens parts.

The timer. You need to control the timing of the enlarger. You can use any type of timer, even that of a clock, the important thing is that it is quick to implement.

Bottles bellows for reagents. The chemical reagents can be reused over and over again, for which should be stored when the dark room is not in operation. Bottles bellows are perfect for this purpose: the bellows is critical to expel the air once you have placed in them with chemicals.

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