Products & Services

Protocase manufactures fully finished custom electronic enclosures and associated parts from a wide variety of materials and components, in 2-3 days with no minimum order. Protocase also provides expert and affordable enclosure design services.

Engrave and Fill

Protocase Tech Tip Video
Engrave & Fill

Protocase Engrave and Fill is a form of marking that is compliant with the following standards:

  • • MIL-STD-130
  • • A-A-56023D
  • • A-A-00208D (US Department of Defense Property)

To create Engrave and Fill marking, your parts are laser marked or machined engraved, and then the laser-engraved sections are filled with ink, according to your specific requirements. The ink fill sits below the edges of the area that has been marked – it does not go all the way from the bottom of the laser-marked area to the top of the substrate.

The end result is a durable and striking form of marking that meets MIL-STD-130 and other standards.

Protocase Engrave and Fill is offered as part of our standard 2-3 day leadtime*.

We are currently offering Engrave and Fill text on your custom parts, panels and enclosures. (Stay tuned – we are working on adding logos and large areas to our Engrave and Fill capabilities).

Engrave and Fill Samples


Engrave and Fill is available on aluminum.


We can ink fill any substrate and finish that already qualifies for either laser marking or machined engraving.

In addition to no finish aluminum, you can apply Engrave and Fill on many different finishes:

(Note: For anodizing and chemical film conversion, the process of laser marking or engraving happens prior to the finishing process. Following the selected finishing process, the parts are then ink filled to complete the Engrave and Fill process.)

Fill Colors

For your Engrave and Fill ink colors, you may choose from any of our stocked silkscreen colors.

In order to create the best contrast (which is required by MIL-STD-130), we recommend choosing white or black ink fill, depending on the finish of your parts.

Limitations & Constraints

Maximum Part Size 28” x 31” x 6.5” (711.2mm x 787.4mm x 165.1mm)
Minimum Material Thickness 0.051” (1.295mm)
Minimum Engraving Depth 0.015” (0.381mm)
Minimum Line Thickness 0.03” (0.762mm)
Minimum Spacing Between Letters 0.025” (0.635mm)
  • • Depending on the style and height of the font you select, your line thickness must be at least 0.030” (0.762mm)
  • • Positional tolerance for Engrave and Fill is the same as our Laser Marking tolerance: +/- 0.020” (+/- 0.508mm)

*For in-stock materials and finishes.

Ink Fill Font Constraints

We recommend using uppercase letters as much as possible because lowercase letters have varying widths in a stroke.

Adobe Illustrator

  • • Character spacing can be adjusted to meet spacing constraints
  • • The ability to manipulate character spacing allows us to have a smaller minimum font size
Font Font Weight Minimum Size Minimum Character Spacing
Arial Regular 25pt 55
Arial Bold 17pt 90
Arial Black 12pt 75
Century Gothic Regular 31pt 15
Century Gothic Bold 17pt 60
DinPro Regular 30pt 25
DinPro Medium 22pt 50
DinPro Bold 17pt 75
DinPro Black 14pt 100
Futura PT Medium 22pt 65
Futura PT Bold 14pt 70
Tahoma Bold 17pt 95

Other Software

  • • When character spacing or tracking cannot be manipulated
  • • Do note that tracking can be adjusted in SolidWorks
Font Font Weight Minimum Size Character Spacing
Myriad Pro Semi Bold 25pt 0
Myriad Pro Bold 26pt 0
Arial Regular 30pt 0
Arial Bold 25pt 0
Arial Black 18pt 0
Century Gothic Regular 32pt 0
Century Gothic Bold 25pt 0
DinPro Regular 30pt 0
DinPro Medium 22pt 0
DinPro Bold 17pt 0
DinPro Black 14pt 0
Futura PT Medium 25pt 0
Futura PT Bold 25pt 0

NOTE: We use the fonts mentioned above as they have proven to deliver good results. Should you submit a file in an alternative font, we will convert it to one of the above options. In instances where the font is unspecified, Arial Black will be selected as the default.

MIL-STD-130 (Table II)

Laser Marking is a permanent part marking method which is recommended for applications requiring MIL-STD-130 (Table II).

This standard provides criteria for the selection of the application process, as well as all other specific requirements that will be part of the deliverable item, such as marking protocol, content, font size, type, location, etc.

Simply stating in the product definition data that the marking be in accordance with MIL-STD-130 is not sufficient. The item identification marking requirements must be determined by the Design and/or Acquiring Activity in their contractual instruments, and tailored to meet the needs of their specific application.

Protocase is recognized solely and exclusively as the Manufacturer.

The customer is recognized as the Design Activity. They retain full design and quality assurance control, as well as full responsibility to the acquiring activity for the delivered product.