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Cookies and privacy choices
Updated: 29 October 2026
Your choice
We use essential cookies to operate sign-in, protect forms and remember your cookie choices. Preferences, detailed session statistics, embedded media and advertising are off until you accept the relevant category. Aggregate statistics to improve the website are on by default, with a free and simple opt-out using Cookie settings or Reject optional. You can reject optional cookies and still sign in, purchase printing time, support a concept and download STL files you are entitled to access.
Choices expire after 180 days. You can withdraw consent earlier using “Cookie settings” on any page. After a change, the page reloads so optional scripts and embeds stop or start according to your choice.
Cookies used by Sebservice
PHPSESSID — essential. Session cookie used for sign-in, security tokens, payment confirmation and session language. It normally lasts for the browser session.
seb_consent — essential. Records the categories you accepted or rejected, the notice version, date and a receipt identifier. Duration: 180 days. The consent receipt is not used for visit tracking. A matching consent record is stored on our server without your IP address or account ID. Records have a 180-day retention period; expired records are cleared when new choices are saved.
seb_language — optional preference. Remembers your chosen language between visits for up to 180 days when preferences are accepted. Without it, the language choice can remain in your current session.
The old unused seb_voter identifier is no longer set and is removed when you visit.
Aggregate statistics and your right to object
To improve the website, we collect daily totals of page categories, entry sources, device categories and approximate active tab time. You can switch this off in Cookie settings or choose Reject optional. The aggregate measurement endpoint does not receive or read your session or consent cookies, does not store your IP address or account ID, and does not retain individual browsing histories. It uses a short-lived page ticket held in memory and a technical receipt containing only a ticket hash and cumulative time to prevent duplicate counting. Receipts expire within four hours and are removed during measurement and dashboard visits. Daily aggregate data is retained for 90 days. An open-tab counter is approximate and does not identify people.
Optional detailed statistics
With statistics enabled, we also measure browser sessions, page categories, device categories, referral domains and approximate active tab time. A random session identifier is created only after consent, and rotates after 30 minutes of inactivity. Detailed activity is retained for 90 days and expired records are cleared on new measured sessions. Administrators are excluded. We do not record form contents, account identifiers, full referral URLs, sign-in tokens or screen recordings. Time stops when the tab is hidden or after 60 seconds without interaction. With statistics enabled, we count page visits and selected project and shop-link clicks on our own server. Records contain a keyed hash derived from the IP address, date and event details. We do not store the raw IP address in these statistics or send these statistics to Google Analytics. Existing web-server security and access logs are separate from these optional statistics.
Optional embedded media
YouTube thumbnails and embedded videos, and the Twitch player and chat, load only after media consent. Live content may be public or require full account sign-in, depending on the creator’s setting. Google/YouTube and Twitch may receive your IP address and browser information and use their own storage when their content loads. Without media consent, you may follow ordinary links to their websites instead.
Optional advertising
Google AdSense is blocked until advertising is accepted here and the configured certified consent management platform (CMP) supplies the required consent signals. This local banner does not replace the certified CMP. If no CMP is configured or it supplies no suitable consent signal, ads remain blocked. Further provider details and choices are shown in that CMP.
Payments and external links
PayPal is contacted when you choose to start or confirm a payment. The coin-wallet PayPal interface is loaded only when you explicitly open it. Payment processing is available without accepting optional statistics, media or advertising. PayPal handles its own website and payment storage. Ordinary links to eBay, TikTok and other sites open an external service with its own privacy choices.
Changing or removing cookies
Use “Cookie settings” to change your choices. You can also remove site data in your browser. We can stop loading optional providers, but cannot directly erase cookies stored on their separate domains; use their settings or your browser to remove those. Clearing the session cookie may sign you out.