Grupo

Glosario





Raster

See 'Half-tone'




Raster ruling L/cm or L/pi

The raster ruling is indicated in lines resp. dots per cm or inch. In screen printing, rasters between 5 L/cm till max. 48 L/cm can be printed, depending on the mesh used.
Guideline: the smallest dot must have a minimal diameter of two threads and one mesh opening.




Register

1: Exact congruence between original (e.g. diapositive) and the printed image
2: Multi colour printing: exact congruence between originals of the various colors and their printed images (color register)
3: Exact congruence of images at the beginning and the end of a print run, or between intermediate printings.




Residual shrinkage

The amount of shrinkage remaining in a fabric after it has undergone all fabric weaving, washing and heat setting steps.




Retentate

Substance retained in the upstream side of a filter.




RF (radio frequency) welding

Utilizes specific bands of radio frequency waves which are directed through specially constructed tooling to form localized melting/joining of certain dielectric thermoplastic materials. Can be used to form hermetic seals. Also known as high frequency or dielectric welding.






Contacto






Sefar AG

Headquarters
Hinterbissaustrasse 12
9410 Heiden – Switzerland


Phone +41 71 898 57 00

Fax +41 71 898 57 21


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