Legal
Privacy
How sphragillum.com handles personal data, in plain terms.
Who is responsible
This website, sphragillum.com, is run by J.P.M. Mertens (“we”), who is responsible for the personal data processed through it. You can reach us at contact@sphragillum.com.
When you visit the site
The site is hosted by Cloudflare. To deliver pages and protect the site from abuse, Cloudflare processes technical data such as your IP address, the type of browser and device you use, the pages you request and the time of each request.
We do not use this data to identify you, and we do not build profiles. The site has no analytics, no advertising and no tracking. The legal basis is our legitimate interest in running a secure and working website (Article 6(1)(f) GDPR).
When you write to us
If you use the contact form, we receive your name, your email address, the subject you choose, your message and the fact that you agreed to this notice. If you email us directly, we receive your message and whatever details it contains.
We use these details only to read and answer your message and to handle any follow-up. While the form is being sent, your IP address is used briefly to block repeated or automated submissions; we do not store it.
The legal basis is your consent, given when you tick the box on the form (Article 6(1)(a) GDPR), and our legitimate interest in answering correspondence (Article 6(1)(f) GDPR). You can withdraw your consent at any time by writing to us.
Who receives your data
- Cloudflare, Inc. hosts the site, delivers it securely, runs the small program behind the contact form, and forwards form messages and email sent to our address to our mailbox.
- Google (Gmail) hosts the mailbox in which we receive and keep your messages.
We do not sell your data and we do not share it for marketing.
Transfers outside Europe
Cloudflare and Google may process data outside the European Economic Area, including in the United States. These transfers are covered by the EU-U.S. Data Privacy Framework or by the European Commission’s Standard Contractual Clauses.
How long we keep it
We keep your message for as long as we need it to answer you and to handle any follow-up, and delete it no later than twelve months after our last contact, unless the law requires us to keep it longer.
Technical data is kept by Cloudflare only for as long as it needs it to deliver and secure the site.
Cookies and storage
The site sets no cookies of its own and uses no tracking technologies. The details are in the cookie notice.
Your rights
You have the right to access the personal data we hold about you, to have it corrected or deleted, to restrict or object to its use, to receive it in a portable form, and to withdraw your consent at any time. To use any of these rights, write to contact@sphragillum.com.
You also have the right to complain to the Autoriteit Persoonsgegevens (the Dutch Data Protection Authority): autoriteitpersoonsgegevens.nl (opens in a new tab).
Security
The site is served only over an encrypted connection, collects as little as it can, and keeps no database of visitors or messages.
Changes to this notice
If the way the site handles personal data changes, this notice will be updated first, with a new date below.
Last updated: 14 November 2026