Spray Powders

Heidelberg has a range of Spray Powders to suit any application. There are many variables to consider when selecting the correct powder and grain size. The main consideration is the type of stock, or more accurately, the underside of the stock that is to be printed upon. Other considerations are the Ink or coating to be used, the height of the stack and the processes to be done after the print run e.g. laminating.

K4 Spray Powder is an inorganic mineral based powder made of natural Calciumcarbonate. Because of its high specific weight it does not create as much dust as organic starch-based powders and allows for minimum consumption, as most of the powder reaches the sheet, making for less cleaning and maintenance. However users should note that K4 Spray Powder is not suitable for subsequent Varnishing or Laminating.

S5 Spray Powder  is an organic starch-based powder that is suitable for all applications and all dry spraying equipment. It is lighter than K4 and creates more dust, however if the right grain size is selected dust can be kept to a minimum as not as much powder is required. To overcome the dust problem KSL have produced an "upgrade" to this product - S5/16 and 22. By removing most particles of 10 microns and under from the powder less dust is created. When used correctly S5 is suitable for subsequent Varnishing or Laminating, will not form blisters or spots and leaves a smooth surface. When using Aqueous Coatings on the press S5WL should be used.

L3 Spray Powder is a natural sugar-based powder and is ideal for printing multi-colour work on a single or 2 colour press when the first pass needs to be sprayed. The powder is dissolved by the water on the blanket via the dampeners and the plate.L3 Spray Powder is ideal for subsequent Varnishing and Laminating if run through the press under impression a final time to dissolve the powder using the moisture on the blanket. Because it dissolves on the blanket no deposits are left behind and cleaning intervals are extended many times over. Machine contamination is minimal as there is no fine dust. Printers should also note that L3 Spray Powder cannot be used on electrostatic spray units. 

Further Information:
Kevin Lampard
Account Manager - Consumables
Tel: +61 3 9263 3388
Email: Kevin.Lampard@heidelberg.com