Information that stays in your browser
Your theme preference is stored in this site’s localStorage area in your browser. Workbench text and calculator numbers are processed in the page’s memory, not sent to a form, remote API or analytics service. If you choose to copy a note, its text is placed on your device’s clipboard.
When you visit the site
Content is delivered through Cloudflare. Hosting and network providers may process technical information such as an IP address and HTTP request to provide the connection and security. Site access logging is disabled; an error log is used for technical operation. Cloudflare explains its data processing in its own policy.
Contact
When you send email, your message is processed by your email provider and the receiving mail system. There are no subscriptions, user accounts, payments or web contact forms here. For a data question, contact the laboratory.
External sources
Source links take you to other websites. Their policies and logs belong to those sites. Fonts and interface files are served from this site.
Sources and provenance
Source check / web edition: 14 October 2026. Historical documents retain their own original dates.