https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13996675Edit ImageSaveSaveEditCropCustom TextPigments: a mill for grinding colours, and an indigo grinding mill. Engraving by H. Mutlow.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 754 px | 300 dpiLarge JPEG 3364 x 2115 px | 300 dpiFree DownloadPigments: a mill for grinding colours, and an indigo grinding mill. Engraving by H. Mutlow.More