POTLOODGUM
pot·lood·gum /ˈpɔtloːtˌxʏm/, say POT-lote-khum. Dutch for pencil eraser.
A one-person* design studio for non-profits, schools and social causes.
* that’s Tjerk, say “chair” + k
Websites
All websitesIt’s about the people, not the briefs.
Personal projects
All personal projectsBecause sideprojects are secretly my main projects.

Walking app
Misty Steps
Design tool
Sprint.cards
Appointment app
Hamaki

Card deck
Brain Tickles
Weekly drawings
52 Cats
Research
All research-
Designing music instruments for people with profound multiple disabilities
How do you design an instrument for someone who can't tell you what they want? Four design principles from a research-through-design project with a music therapist.
Essays
All essays-
Why I love Taskmaster so much
Grown comedians failing at pointless tasks, rivalries, friendships and the occasional bit of real vulnerability. Why Taskmaster is the best thing on YouTube in years.
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“Rouwen & Bouwen, and the whole LLM coding thing”
Notes from a coder, designer and teacher who is proud, uneasy and confused about using LLMs for coding and UX. Only about that.
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Strava optimised the fun out of my running
I wanted to keep fit, be outside and run to faraway villages and back. Strava kept asking a different question. Why I stopped tracking.
Photography
All photos




