The Pilot LAUNDRY TEC is a permanent laundry marker which features the ingenious Pilot Hi-Tecpoint tip, allowing for great precision when writing. Perfect for school uniforms, the long-lasting ink is durable enough to survive the wash, the football match and whatever else life can throw at it. To increase wear and wash resistance further, iron after writing. The Laundry-Tec black ink is set by ironing for 1 minute (cotton setting).