GTT2.0® technology is an open cell structure anilox engraving for cylindrical aniloxes. Now Apex and Van Dam developed together a new engraving structure that uses the technology GTT and fuses it with a unique algorithm to produce a technology breakthrough in anilox structure that enables the production of conical aniloxes. This newly designed engraving technology is called CRXpatent pending.
A conical anilox can only hold an engraving pattern which is not based on axial barriers. Axial barriers will comprise the conical function of the roller. A fusion of engravings was required to create a structure in radial direction on the anilox surface. Apex and Van Dam developed this gravure to hold and transfer inks, to limit leakage and optimize the ink layer.
To accommodate for the conical shape, the engraving design of the anilox rolls are compensated to ensure that the engraving pattern remains continuous . In addition, the engraving pattern may not be isolated meaning the engraving technique requires to be a unique interlinked design. Utilizing the Patent laser engraving technology GTT, which allows any air to flow out of the channels prior to when they enter the doctor chamber for ink replenishment, and thus to reduce entrapment of air. Such defined control of the flow of liquid and air is essential to deliver a consistent ink transfer.
The challenge is to create an engraving that provided a consistent ink flow on :
1 – A conical shape
2 –A press that has each inking unit set at a different Angle to vertical
The engraving has to compensate for the different unit angle and the conical shape allowing the Ink to flow consistently across the anilox surface like in a maze , Too open a channel will result in ink leakage and inconsistent color from top to bottom of the cup , A closed engraving will result in other print issues including shade variation through speeds.
The engraving pattern is laser engraved using a fusion of GTT technology with a uniquely designed algorithm to ensure the repeatability and quality of ink transfer
The new engraving Technology CRX is available in seven types XXS , XS , S , M , L , XL , XXL each size increasing in volume based on a fixed optimum geometry.