H (Set Heat (Darkness)) — DPL Command Reference

Plain English

Sets the printhead heat level (darkness/density). Values range from 00 to 30, where higher values produce darker output. Start around 07-10 and adjust based on print quality and barcode scan results.

When to use

At the start of a label block to control print darkness. Essential for barcode readability.

Syntax

Hnn

Parameters

Parameter	Description
`nn`	Heat value 00 (lightest) to 30 (darkest), zero-padded

Example

H10

Set heat level to 10

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