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  • Rotary Screen Engraving Questions

    As one of the most experienced rotary screen engraving companies, we have a lot of knowledge to share – and we would like to help, whether you’re a student, a potential client – or for whatever reason you have a question about rotary screen engraving or colour separation. So simply reply below with your question – and we will answer you as soon as we can.

    Rotary Screen Engraving Questions

    1. James L :

      Hi

      We’re just setting up in the wallpaper printing business, to begin with we’re going to be outsourcing the printing however we do plan on bringing this in-house in future. When we’re outsourcing, would we be best advised to allow the printer to deal with the screen side of things, or would we have more control if we get the screens engraved ourselves and then give this to the printer we decide to use?

      Thank you

      • admin :

        Hello James, Thank you for your question.

        Initially, at the design stage it would be beneficial to meet with the Rotary Screen Engraving company to fully discuss your separation and engraving requirements.

        As we deal with the majority of UK printers we can offer guidance on who will be best suited for your particular needs.

        Once your separations are completed, sampled and approved, you can then choose your preferred print company, giving you far more flexibility with regard to lead time and costs.

        Before committing to the actual engraving Meshtex would be delighted to sit down with your chosen print company to fully discuss any special requirements, such as screen mesh, trim positions, amount of overlap and so on.

        This pre-production meeting can be very important as any potential problems or pit falls could be identified before the screen is engraved, especially as certain print companies may prefer to have input regarding screen mesh and other variables to suite their specific production process.

    2. Ian :

      What is the difference between a 125 Penta Rotary Screen and a 135 Nova Rotary Screen?
      Thanks in advance
      Ian

      • admin :

        Hi Ian. Basically there are 2 differences, firstly the 135 mesh screen is finer, as it has 135 holes in a linear inch and the 125 mesh has 125 holes. Secondly the hole shape is completely different in the Nova screen, allowing the paste to flow through the screen more easily, Therefore a 135 Nova would be ideal for printing a full cover or “blotch” screen.

    3. Js :

      Hi, quick rotary engraving query, which screen is best for printing tonal designs?

      • admin :

        Hi. This is slightly subjective depending on the print company and the type of paste that will be used. We believe that tones still look very good on 155 Penta screens and would use them for the majority of tonal designs. However, If the design was particularly fine and delicate we may decide to use the 195 Nova screen, however these are more expensive and often due to price issues the customer will decide upon the 155 mesh. In addition the 155 mesh does appear to have more choice with regard to the tonal raster patterns that are available.

    4. Js :

      Hi.
      Thanks for that! Another quick question, How do you know how much overlap to add when separating a design?

      • admin :

        Hi. In colour separation, the amount of overlap is determined in several ways, the type of design, the fabric type, the amount of colours, the rotary screen mesh and the end use of the product. Basically everything must be considered before deciding on this.
        A fashion design would normally have a smaller overlap than a furnishing design, as it would normally have less colours in the design. A furnishing design may have a larger overlap, as it may have more colours and therefore be difficult to keep in register on the rotary print machine.
        The type of fabric can have a big effect on overlap as some fabrics move around quite a lot during printing, so a larger overlap is necessary.
        Probably the biggest factor is the printing company, as some printers are better than others and some have newer and more modern equipment. After many years of dealing with all the major UK printers and working closely together we tend to know the amount of preferred overlap for each company.

    5. Wayne :

      Dear Meshtex,

      Nice site. Here’s something I’m not sure about, what would determine the thickness of the emulsion on a Rotary Screen?

      Thanking you in advance

      Wayne

      • admin :

        Thank you Wayne.
        We would decide on the emulsion thickness depending on the type of design or the type of print paste that would be used.
        If a design was tonal, we would use a thin emulsion so that we would use the minimum amount of laser power to remove the emulsion, thus keeping the engraving nice and fine with no “overburn’. If a print paste with big particles is to be used such as metallics, we would apply a thicker coating so that the particles within the screen could not push through the emulsion or even wear down the emulsion when it gets trapped between the outside edge of the screen and the substrate.

    6. Alowndes :

      What is the maximum width of Rotary Screen that you engrave?

      • admin :

        Hello, and thank you for your question.
        The maximum length Rotary Screen that we can engrave is 3500mm and we can engrave Sceens as narrow as 250mm, even less if required.

    7. Alowndes :

      Thank you for the speedy response! Which would you say is the most common Rotary Screen that you engrave?

      • admin :

        Hi. My pleasure. I would have to say that 125 mesh is our most popular Rotary Screen.

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