polishing pitches pitch is a natural product. The disadvantage is that some bad places in time to age and change their characteristics (eg pitch short of the company Gugolz GG). One should use up to 1.5 years after delivery. The pitch of the firm Tivoli (unfortunately there's not more) and has a specific standard Gugolz
higher The code provides the harder the pitch
eg Gugolz pitch in the hardness 55, 64,73,82,91
the 55mm pitch is quite soft and is often used for blending with harder pitches, rosin or shellac for a particular property or hardness, or toughness Sprödheid get.
The pitch from Zeiss has other names but this is also the higher the number the harder the pitch. Would pay 28, 30, 32, 34, 36, hardness after the former Zeiss standard defined as the temperature at which a needle with an area of 1mm ² with a load of 1kg in 10 seconds penetrates 2mm deep.
Here is a small help for the selection of pitches
It depends on the size of the body-larger per the body so soft unfortunate
material hardness (glass, crystal, plastic, metal, semiconductor) per sensitive the Materia l r so soft unfortunate
heat in the edit room per warmer the room harder so unfortunate
operation (pre-or polishing) - polishing hard the pitch does not change as quickly
polishing soft pitch can adapt well
| hard polishing pitch for | Soft polishing pitch for |
| Small pieces | large panels |
| small lenses on large lens bodies | Large lenses and lens on small bodies |
| Hard glass | Soft glass |
| less accurate work, worked with a large spindle speeds and heavy weight load is raised surface | Accurate Work being carried out with smaller spindle speed and lower weight concave surfaces |
shellac : This is a natural, known for thousands of raw material. He emerges as stick lac from the secretion of the female scale insects paint if they elicit a stab in the young shoots of certain trees in India and Thailand, the branches a resin juice.
After drying, we Resin removed, processed, cleaned several times and broken into flakes.
With shellac, the pitch becomes tougher and tougher. Man, it can mix with softer pitch and polishing of lenses used. One advantage is that it's radius is not changed as quickly and thus high life has
Rosin: rosin is obtained from the Rohbalsam (resin) of the jaw. By distillation and the heat treatment Rohbalsam turpentine oil and other liquid components are removed. After the Cleaning process remaining, cooled mass is called rosin. Rosin is a brittle, almost odorless and tasteless, soluble in water mass. In pure state, it feels sticky and is transparent. Rosin has no defined melting point and is soluble in acetone, alcohol, ether, and various other solvents. It is used for mixing soft pitches.
Gugolspech to get a rosin 20% of suppliers already ago
For a more brittle surface of the pitch and thus the to increase by polishing, pitch is mixed with resin.