Offprint journalhttps://img.astralon.ru/Notes on image size, colour and file formats from the Offprint editors.en-GB Why we ask for 4000 pixels on the long edgehttps://img.astralon.ru/journal/why-4000-pixels/https://img.astralon.ru/journal/why-4000-pixels/Fri, 18 Sep 2026 09:00:00 GMTThe minimum size for contributors was not picked at random. Here is the arithmetic behind it. Warm and cool: reading a palette from a photographhttps://img.astralon.ru/journal/warm-and-cool/https://img.astralon.ru/journal/warm-and-cool/Fri, 21 Aug 2026 09:00:00 GMTHow to pick three colours from a photo and keep a layout calm, with a worked example. JPEG, WebP or TIFF: what to ask for and whenhttps://img.astralon.ru/journal/jpeg-webp-tiff/https://img.astralon.ru/journal/jpeg-webp-tiff/Tue, 14 Jul 2026 09:00:00 GMTA short guide to the three file types our customers ask about most, and what each costs in size and flexibility.