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Dear Business Partner
It is our top priority to serve you in the best possible way, despite the current turbulences with the Corona virus. I therefore want to give you an update on the status of the Sefar Group, which also includes Monosuisse.
• The Sefar Group complies to all the local regulations with respect to the containment of the Corona virus.
• We have taken additional internal precautions to assure the continuation of our production and the deliveries to you.
• All of our spinning and weaving plants worldwide are currently operating without limitations.
• There is a possibility of national restrictions in countries, where we operate our decentralized fabrication units. This may cause delays in fabricated items. For details, please contact your local Sefar subsidiary.
• Global limitations on freight capacity, in particular for air shipments, may also affect the delivery time.
Being a fully integrated supplier, Sefar controls and ensures the entire supply chain of our technical fabrics, from the yarn production at Monosuisse to the shipping of the fabrics or the finished articles. You are in good hands at Sefar.
Should your operation face any supply challenges where we might be able to help, please let us know. Your contact person is reachable at any time.
We will keep you updated on any changes affecting our delivery performance.
I wish you good health!
Description of step exposures
Step exposures are a means of determing the optimum exposure time. Correct exposure time depends on the characteristics of the photo emulsion or film, the mesh, overall thickness, the light source, and the distance between the lamp and the material to be exposed.
Underexposed stencils do not harden all the way through; photo emulsion on the squeegee side is washed away during development. A smudged photosensitive layer is a sure sign of underexposure. With inadequate rinsing, some of the dissolved photo emulsion sticks in the open parts of the stencil. A barely visible scum is left behind after drying, which impedes ink flow during printing.
Underexposed stencils also have poor resistance to solvents, printing inks and mechanical wear. The stencil is also difficult to reclaim afterwards.
Overexposed stencils may suffer from reduced resolution; this is especially noticeable with white mesh.