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Allison Doctor Blades





Allison Systems doctor blade manufacturing proccess controls and documents blade quality. All blade materials and edges are performance engineered for real presses, inks and substrates. Their processes also verify critical base material properties, so that there are no expensive surprises on your presses.



Metal Doctor Blades

White (CX)
The most common carbon steel blade material is a silver colored, high quality steel with economical life and excellent metallurgical properties. CX can be used in all gravure and flexo doctoring and containment applications.
CX is available in 6, 8 and 10 mil thicknesses with RND (Rounded), STD (Standard) and SUP (Superhoned) bevels.


Blue (CB)
This is CX material with a blue oxide layer that helps to identify the beveled edge. CB can be used everywhere CX is used.
CB is available in 4, 6, 8, 10, 12, 15, 18 and 20 mil thicknesses with UNH (Unhoned), RND (Rounded), STD (Standard) and SUP (Superhoned) bevels.




Stainless (SS)
All of the quality properties on CX material with the added corrosion resistance needed for certain applications. This material has a silver surface color and is magnetic, so check labels to distinguish from CX. SS can be used in all gravure and flexo doctoring and containment applications although it should be used cautiously with ceramic anilox rolls.
SS is available in 6, 8, 10, 12 and 15 mil thicknesses with RND (Rounded), STD (Standard) and SUP (Superhoned) bevels. Not all bevels are available in all thicknesses.




Gold (QR)
Special tool steel metallurgy with very long life that is excellent for abrasive inks. QR material can also help reduce roll scoring issues because it wears in a powder form that can easily be flushed away from the blade. This is unlike other materials that can form wire burrs that break off and become trapped between the blade and cylinder as the blade wears. QR can be used in gravure and flexo doctoring and containment applications with both chrome and ceramic rolls. 
QR is available in 6 and 8 mil thicknessses with RND (Rounded), STD (Standard) and SUP (Superhoned) bevels.



Laser Gold (QRH)
Our gold material, QR, with an added laser hardened tip for high wear applications. QRH is proven to last 5 to 10 times longer than CX material and is a good alternative to costly ceramic tipped blades. QRH can help reduce spitting problems with UV inks. QRH is mainly used in flexo doctoring applications with ceramic anilox rolls. Gravure customers who are running ceramic rolls can also use QRH but this material cannot be used on chrome cylinders

QRH is available in 6, 8, 10 and 12 mil thicknesses with RND (Rounded) and STD (Standard) bevels.




White Plus (CXP4)
White carbon steel material, CX, with a precision low-friction metallic coating for difficult flexo and gravure doctoring applications. This material is not recommended to used in flexo containment applications. CXP4 is beneficial when running chrome gravure cylinders with minimal engraving since the coating helps to provide lubrication between the blade and cylinder and reduce haze and streaking issues. The coating will also provide corrosion resistance when used with water based inks.

CX is available in 8 mil thickness with SUS (Superhoned Plus) bevel.




Gold Plus (QRP4)
Special tool steel metallurgy with very long life, QR, and a precision low-friction metallic coating for difficult flexo and gravure applications. This material is not recommended for use in flexo containment applications. QRP4 is beneficial when running chrome gravure cylinders with minimal engraving since the coating helps to provide lubrication between the blade and cylinder and reduce haze and streaking issues. The coating will also provide corrosion resistance when used with water-based inks.

QRP4 is available in 6 and 8 mil thicknesses with SUS (Superhoned Plus) bevel.




Plastic & Composite Doctor Blades



Fiberglass (FR)
A composite material made from fiberglass for flexo doctor and containment blades on ceramic anilox rolls and abrasive inks. FR provides longer life than carbon steel metal blades with good metering quality. FR is best used with ceramic anilox rolls with <500 LPI screens.
FR is available in 20 mil thicknesses with a SLR (Seal Relief 15°) bevel.



Fiberglass Plus (FRS)
A composite material made from fine weave fiberglass for flexo doctor and containment blades on ceramic anilox rolls and abrasive inks. FRS provides all the features of FR and improved metering quality approaching that of metal blades. FRS can be used with any ceramic anilox.
FRS is available in 14 and 20 mil thicknesses with a SLR (Seal Relief 15°) bevel.




Graphite (GR)
A composite fiberglass material with added graphite lubricant to extend blade life. For flexo doctor and containment blades on larger ceramic anilox rolls, long runs, and abrasive inks. GR is commonly used for higher-end graphics in corrugated applications.
GR is available in 20, 25, and 35 mil thicknesses with a SLR (Seal Relief 15°) bevel.




Mylar (MY)
MY is a good choice for flexo containment blade applications since it can reduce back doctoring and allow debris to pass by the blade instead of trapping the debris behind the blade like metal blades can. To further allow debris to pass by the blade, use a blade width that is 1/16” to 1/8” wider than the doctoring blade.
MY is available in 7.5 and 14 mil thicknesses with an UNH (Unhoned) edge.



Celanex (PBT)
PBT is another good choice for flexo containment blade applications when you need a blade that is a little stiffer than MY.

PBT has similar characteristics to MY and is available in a 20 mil thickness with an UNH (Unhoned) edge.





Delrin (DE)
DE can be used in flexo doctor and containment applications that require moderate metering quality. DE provides longer life than carbon steel metal blades and can reduce cut hazards associated with metal blades in chambered applications.

DE is available in 30, 50, and 62 mil thicknesses with UNH (Unhoned), STD (Standard 20°), and SLR (Seal Relief 10°) bevels.





Delrin Plus (DET)
DET can be used in flexo doctor and containment and some gravure applications that require moderate metering quality. DET has all the properties of the DE material with added lubrication for long runs and abrasive inks.

DET is available in 30 and 35 mil thicknesses with UNH (Unhoned), STD (Standard 20°), and SLR (Seal Relief 10°) bevels.

 


Nylon Plus (NY)
NY can be used in special gravure applications that don’t require the wipe quality of a metal blade. The lubricant in NY can help extend the life of chrome cylinders.

NY is available in 62 and 90 mil thicknesses with UNH (Unhoned) and STD (Standard 55°) bevels.
 


UHMW (PE)
PE can be used in corrugated and flexo doctoring applications that have coarse anilox rolls and don’t require the wipe quality of a metal blade as well as flexo containment blades. Since PE material is soft, use with caution because there is a risk of particle embedment that could lead to roll damage.

PE is available in 15, 30, 50, 62, 80, and 90 mil thicknesses with UNH (Unhoned), STD (Standard 45°), and S30 (Standard 30°) bevels.

Edge Shapes


Standard (STD)
A beveled edge shape with a nominal 15° bevel angle.
Some inks or cylinder conditions require the more rigid tip for maximum cylinder clean-up that the standard bevel provides. The thin initial tip of the standard bevel will provide quick startups and works well for short run work.


Superhoned (SUP)
A beveled edge shape with a nominal 4.5° bevel angle. The long bevel provides effective tip deflection and contact angle control under applied blade loading forces with minimal tip growth as the blade wears.




Superhoned Plus (SUS)
A beveled edge shape with a nominal 2.2° bevel angle. The very long bevel provides the same force control features of the Superhoned shape with even less tip growth as the blade wears.



Rounded
A rounded edge offers a strong, rigid, precision polished working edge, that is not easily damaged, at an economical price. The rounded edge shape is suitable for ceramic anilox rolls that are rough or have fragile cell walls, very abrasive inks, and where maximum anilox clean-up is not required. Rounded edge blades are typically not recommended for gravure applications.

Seal Relief (SLR)
A plastic or composite material beveled edge shape with a nominal 10° to 15° bevel angle, depending on material. Long bevel profile to help reduce ink leakage past the flexo chamber end seals.

SLR  is only available with FR, FRS, GR, DE, and DET material
.

Unhoned
An unhoned blade has a square edge and is typically used only for backer blade applications.