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Marking a Front Panel: Engraving, Laser, Silkscreen or Pad Print

August 20, 2026

Every marking method on a front panel happens at a specific point in the process. Choosing the method is therefore choosing a manufacturing sequence, and changing your mind late is expensive because the part has to go backwards.

The five methods

1. Mechanical engraving, then anodize

A small end mill or an engraving cutter cuts the character into the metal. The part is then finished and anodized, so the oxide layer covers the groove as well as the face.

• Looks like: a shadow. Same colour as the panel, readable by depth and by the light catching the groove edge. Subtle and expensive looking.
• Durability: essentially permanent.
• Cost: machine time proportional to the length of the toolpath. A logo with a lot of detail is slow.
• Watch out for: the cutter leaves a radius in inside corners, so fine serif fonts and sharp angles lose definition. Design the artwork for a round tool.

2. Engraving, then paint fill, then anodize or lacquer

The same groove, filled with a contrasting paint or enamel, then the excess is wiped or machined off.

• Looks like: the classic white on black or black on silver instrument panel.
• Durability: very good. The paint sits below the surface so it does not wear with handling.
• Cost: engraving plus a manual fill and clean operation.
• Watch out for: fill quality is a hand skill and varies. Ask for a sample. Also decide the sequence with the anodizer, because filling before anodize and filling after anodize give different results and not every finisher will accept a filled part in the tank.

3. Laser marking after anodize

A fibre laser burns through the dye in the anodize layer without removing much material.

• Looks like: a crisp light grey or near white mark on black anodize. High contrast. On clear anodize the contrast is much weaker.
• Durability: good. The mark is in the oxide layer, not on top of it. The burnt area is slightly less corrosion resistant and can look different after years in humid conditions.
• Cost: low per part once programmed. The cheapest way to do serial numbers and variable data.
• Watch out for: the mark is the colour the laser makes it, which you cannot choose freely. Colour anodize can shift locally around the mark. Always sample it on the real colour.

4. Silkscreen

Ink pushed through a mesh screen onto the finished surface, then cured.

• Looks like: a printed mark sitting on the surface. Any colour, including opaque white on black and metallic inks.
• Durability: moderate. It wears where fingers rub. A clear coat over the top helps and adds a step.
• Cost: a screen per colour per design, then very cheap per part. Economical above a few hundred pieces, expensive below fifty.
• Watch out for: registration on a curved or recessed surface is difficult. Minimum feature size is larger than laser or engraving.

5. Pad printing

Ink picked up from an etched plate by a silicone pad and transferred to the part.

• Looks like: similar to silkscreen.
• Durability: similar to silkscreen.
• Cost: cliché plate per colour, cheap per part.
• Watch out for: better than silkscreen on curved surfaces, which makes it the usual choice for knobs and cylindrical parts. Slightly softer edge definition.

Comparison

Method	When in process	Contrast on black	Durability	Small text	Low volume cost
Engrave then anodize	Before finishing	Low, shadow only	Permanent	Good	Moderate
Engrave and paint fill	Before or after	Very high	Very good	Good	Moderate to high
Laser after anodize	After finishing	High	Good	Excellent	Low
Silkscreen	After finishing	Very high	Moderate	Fair	High
Pad print	After finishing	Very high	Moderate	Fair	High

The sequence trap

This is where products get delayed. Each method fixes a different point of no return:

• Engraving is before finishing. If you change the artwork after the panels are anodized, the panels are scrap.
• Laser and print are after finishing. Artwork can change up to the last minute. This flexibility is often worth more on a first production run than the appearance difference.

For a first run of a new product, laser marking after anodize is the low risk choice. For a mature product you will make for years, engraving is usually the better looking and cheaper one.

Artwork the shop can use

Send vector artwork, not an image. Specifically:

• DXF, AI or SVG with all text converted to outlines. A font name is not a deliverable, because the shop will not have your licensed font.
• Position and size dimensioned on the panel drawing, not just implied by the artwork file.
• Line width for engraving, so the programmer knows the cutter size you expect.
• Colour by a standard reference for printed marks, for example a Pantone number, not a screen colour.
• Depth for engraving, typically 0.1 to 0.3 mm.

Legibility and layout

Two practical rules that come up on almost every audio panel:

1. Label the control, not the position. Text that sits under a knob gets hidden by the user’s hand when they turn it. Above or to the side is read more often.
2. Match the tone to the product. A high contrast white silkscreen on a black panel looks modern and slightly pro audio. A shadow engraved mark on the same panel looks quiet and expensive. Both are right for different products, and this is a brand decision rather than a manufacturing one.

Frequently asked questions

Keep reading

• Which Aluminum Alloy to Use for an Anodized Audio Part
• Anodize Colour Matching Across a Batch and Across a Year
• How to Specify a Brushed Finish on an Audio Front Panel

This guide is part of Finishing Audio Parts: Anodize, Brush and Blast, one of four sections in the guide library.