Oil-Based Ink for Pre-Inked & Roller Stamps - Specially formulated for pre-inked stamps, roller privacy stamps, and rubber gel pads. Ensures smooth, consistent ink release without drying or clogging. Waterproof & Long-Lasting - Permanent pigment ink resists water, sunlight, and fading for crisp, durable impressions that last indoors or outdoors. Extra Dark Coverage - Deep black pigment provides rich color density to hide confidential information, block out text, or obscure mailing details effectively. Non-Toxic & Eco-Safe - Low-odor, skin-safe, and compliant with environmental standards including REACH, TSCA, and California Proposition 65. Suitable for marking food packaging under USDA & FDA 21 CFR 175.105. Great Value & Easy Refill - 20ml (0.68oz) bottle refills multiple pre-inked stamps or roller inkers, saving money over replacements while maintaining excellent print quality. Refill your pre-inked or roller privacy stamps with confidence using BCH Black Oil-Based Stamp Refill Ink. Formulated with a premium pigment polymer resin, this ink delivers extra-dark, waterproof, and UV-resistant prints on porous surfaces such as paper and cardboard. Unlike water-based inks, BCH's oil-based formula won't damage pre-inked or gel pad stamps. It seeps into the rubber or gel pad surface to restore smooth ink flow, ensuring bold, clear impressions every time. Ideal for: Address blocker / privacy roller stamps Pre-inked return address stamps Oil-based rubber or gel pad stampers Office, postal, and labeling applications This eco-friendly, non-toxic ink meets multiple safety and compliance standards (REACH, SVHC, TSCA, IEC, and Prop 65). It's safe for everyday office use and suitable for marking food packaging under USDA & FDA guidelines (21 CFR 175.105). Important: For porous surfaces only (paper, cardboard, wood). Do not use on non-porous surfaces like glass, metal, or plastic. For non-porous applications, use BCH All-Surface Stamp Ink instead. Condition: New and factory-sealed 20ml bottle. Compliance Disclaimer: This ink is compatible with pre-inked and roller stamps from various brands. It is not manufactured or endorsed by other stamp brands, and any references to compatibility are for identification purposes only.