PMU Knowledge Hub

Get access to our latest news by signing up for our newsletter.

Membrane and non-membrane cartridges compared by the presence of an effective fluid barrier.

Membrane vs. Non-Membrane Tattoo Cartridges: What's the Difference?

A sealed membrane provides a barrier against backward fluid transfer toward the grip and machine. A non-membrane cartridge lacks that barrier. Match the cartridge design to your machine instruction...

Ink residue visible on the inner rim of a tattoo machine grip opening.

Why Is Ink Getting Inside My Tattoo Machine Grip?

Ink found inside a grip does not identify a single cause. Residue may enter during a cartridge change, while ink behind the cartridge can also raise concern about backward leakage.

Tattoo work paused with the cartridge held clear of the client's arm.

What Should I Do If a Tattoo Cartridge Membrane Breaks Mid-Session?

A suspected membrane rupture calls for more than a cartridge change. Stop the machine, separate affected items, record what happened, and get equipment-specific advice before reuse.

Intact and torn tattoo cartridge membranes shown side by side.

Why Do My Tattoo Cartridge Membranes Keep Breaking?

Use the pattern of repeated membrane failures to identify a suspect batch, a machine-cartridge combination, or a setting that needs correction. Keep observations separate from confirmed causes and ...

Illustration comparing gel, ointment, and cream textures

Microblading Aftercare Gel vs. Ointment vs. Cream: Which Should You Choose?

Start with your artist's aftercare instructions. When more than one product is suitable, compare the exact formula's intended use, texture, and finish rather than choosing by its gel, ointment, or ...

Hands turning a generic ointment jar to check its label

Petroleum Jelly or a Multi-Ingredient Ointment After Microblading: What Should You Check Before Using Either?

Plain petroleum jelly offers a single-ingredient approach; multi-ingredient ointments combine a base with additional ingredients that vary by product. Either may fit a plan that includes the specif...