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DTF & UV DTF Printing: Complete Guide
DTF & UV DTF Printing: Complete Guide
July 7, 2026 —
DTF (direct-to-film) and UV DTF printing let small businesses and hobbyists create custom apparel, stickers, and decals without the overhead of screen printing or embroidery. This guide rounds up e...
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How and Where to Recycle Ink Cartridges
How and Where to Recycle Ink Cartridges
July 26, 2023 —
Last updated: August 2026 — by William Elward, Founder of Castle Ink
Wondering what to do with your empty ink and toner cartridges? You have more options than you might think, and a few of them p...
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Printer Error Codes Explained: HP, Canon, Epson, and Brother
Printer Error Codes Explained: HP, Canon, Epson, and Brother
August 7, 2026 —
Printer error codes look cryptic, but almost all fall into a few categories and most resolve in under ten minutes without a service call. This is a reference for the codes people actually hit on HP...
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About Castle Ink
About Castle Ink
October 28, 2019 —
Castle Ink is a family-owned and operated printer ink and toner cartridge retailer based on Long Island, New York. Since 2005, we have helped more than 1 million home users, schools, and small bus...
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Toner Cartridges for Laser Printers — Compatible & Replacement Options
Toner Cartridges for Laser Printers — Compatible & Replacement Options
November 1, 2019 —
Laser printers use toner cartridges instead of liquid ink to produce fast, sharp text documents and business prints. Each printer model requires a specific toner cartridge number, and using the c...
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What Ink Does the Canon PIXMA TS3720 Use?
What Ink Does the Canon PIXMA TS3720 Use?
August 24, 2026 —
Quick answer: The Canon PIXMA TS3720 uses PG-275 / CL-276 ink cartridges — one pigment black and one tri-color — with higher-capacity PG-275XL / CL-276XL versions available. Two cartridges in total...
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