Glaze Types


On Kyocera printheads, glaze refers to a pattern of glass deposited on the surface of the ceramic substrate, underneath the thin film heaters. The outermost layer is the overcoat, not the glaze. Glaze is necessary for efficient performance of thermal printheads because it retards the escape of heat through the ceramic substrate, leaving more heat to flow into the thermal media.

Flat Glaze

Flat glaze is a layer rather than a mound. It is very wide compared to the heater size, although it does not cover the whole ceramic wafer.
Flat glaze printheads are preferred in fax application because the alignment of the platen roller to the heater line is less critical.

Partial Glaze

Classic partial glaze is a mound of glass underneath the heater line.
Partial glaze printheads dominate the bar code and label printer applications. Most of the standard Kyocera printheads are built on partial glaze. The heater indentation is elevated by the glaze mound for good contact with the media. The size of the partial glaze mound is well balanced between efficient dissipation and accumulation of heat.

Thin Glaze

Thin glaze has a smaller glaze volume compared to partial glaze, so it more efficiently dissipates heat to the substrate and carries less heat over to the next print line. Thin glaze raises the print speed limit beyond which history control is required and are they are used to increase the speed of bar code and label printers.

Double Partial Glaze

Double partial glaze has an additional convex just above the heater line, allowing for higher partial pressure against the media for more efficient heat transfer to the media. This feature works better for monochrome (black and white) printing with battery power.

Super Fine Glaze

The heater line is formed on the top of the convex portion of the glaze layer that covers the entire surface of the ceramic substrate.
Featuring a precise convex shape and greater flexibility for choosing glaze thickness, the super fine glaze covers a wide range of print speed requirements, allowing for high print quality and high heat efficiency.

Full Glaze

Full Glaze is an advanced design to cover an entire surface of the ceramic substrate. With its shape similar to Flat Glaze over the heater line area, it offers a greater range of glaze thickness for optimized heat control to create best print quality at any print speed.

Real Edge Type

The heater line is formed on the real edge of the ceramic wafer. Real edge type printheads have an advantage for full color printing on stiff media such as ID cards or prepaid cards that cannot be easily bent.

Corner Edge Type

Due to the location of glaze formed on the corner edge of a ceramic wafer, corner edge type printheads have a very small glaze volume and achieve a very quick heat response.
The corner edge type is suitable for barcode applications.


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