What is the difference between the types of this product?

ali 120

Senior Member
I found that there is more than one type of ink drying powder in offset printing machines, and I do not know what the difference is between them, what is meant by the numbers printed on the product, and which is better.
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Finer/heavier powder used depending on stock and ink coverage. Ask your supplier for recommendation after discussing your typical runs.
 
  • Hi sir
    The difference between the types is the grain diameter, it must be well chosen to avoid printing problems.
    What do the numbers on the back of the product mean? The higher the numbers, the more they mean. The lower the numbers, the more they mean.
     
    Hi sir

    300 Indicates the particle size (particle size in microns). The higher the number, the coarser the powder.

    25C designates a specific characteristic of the powder (composition, coating type, or other technical specification).

    500 indicates a finer particle size than 300, meaning a smaller powder suitable for prints requiring less relief.

    15C Fine Indicates a finer particle size (15 microns) and a specific powder type.

    For offset printing, the choice depends on your print media (coated paper, cardstock, etc.) and the desired finish. A finer powder (500 - 15C Fine) is often used for prints requiring less relief and a better finish, while a coarser powder (300 - 25C) is ideal for printing on thicker media where faster drying is required.

    Good luck and be welcome
     
    Hi sir

    300 Indicates the particle size (particle size in microns). The higher the number, the coarser the powder.

    25C designates a specific characteristic of the powder (composition, coating type, or other technical specification).

    500 indicates a finer particle size than 300, meaning a smaller powder suitable for prints requiring less relief.

    15C Fine Indicates a finer particle size (15 microns) and a specific powder type.

    For offset printing, the choice depends on your print media (coated paper, cardstock, etc.) and the desired finish. A finer powder (500 - 15C Fine) is often used for prints requiring less relief and a better finish, while a coarser powder (300 - 25C) is ideal for printing on thicker media where faster drying is required.

    Good luck and be welcome
    I found the 300 powder to be coarser than the 500 powder.
     
  • I think that perhaps your of the wrong impression that the powder dries the ink. Spray powder does nothing more than to offer a barrier between sheets to prevent setoff from the freshly printed ink on one sheet to the underside of the sheet on top of it. An additional benefit of the barrier thats created would be to allow some air space between the sheets to AID in drying, but I would suggest that the real "drying" should be more from a combination of your infarfed lamps and your hot air heaters, along with the evacuation of moisture laden gasses from the delivery.
     
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