- Local websites
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!
Mioré between film and mesh
In half-tone printing, an additional moiré effect can result from unsuitable angling between the half-tone film and the screen printing mesh. This effect is most plainly visible in monochrome prints, whereas multi-color printing tends to conceal it.
The greatest risk of interference between the film angle and the symmetrical mesh geometry occurs at 0° / 45° / 90°.
This is why the half-tone angle and the mesh threads should never run parallel to each other. In offset printing, the recommended angle for the dominant color is 45° which, when laid onto the mesh, can result in moiré.
There are two possibilities for preventing all this: angle the mesh, or angle all four colors with respect to the mesh.
(or all at 22,5 °)
On economic grounds, we recommend stretching the mesh straight but pre-angling the diapositives of all separation.
With five, six and more colors, angling should be chosen so that pale colors fall at the same angle as their deep complements, e.g. deep red with pale blue, deep blue with pale red. An additional grey should be angled so as not to coincide with other strongly grey-like colors.
By the type of stencil:
The moiré effect is less apparent with an indirect stencil, since the influence of the mesh is less pronounced than in the case of direct stencils.
By the fineness of the mesh:
The finer the mesh in relation to the half-tone count, the less visible is the moiré effect.
Recommended ratio between mesh count and the fineness of the half-tone:
Mesh count/cm :
Screen pitch lpcm
SEFAR PET 150-31yellow
3.75 : 1
5.00 : 1
i.e. the mesh number is divided by the ratio.