Abstract: The disclosure is generally related to a decoder system and, more particularly, to a decoder system comprising a coding composition, a decoding composition and optionally, an erasing composition. The disclosure also provides decoder writing instrument systems comprising a coding writing point in fluid communication with a coding composition, a decoding writing point in fluid communication with a decoding composition and optionally, an erasing writing point in fluid communication with an erasing composition.

Abstract: A highlightable ink including a colored pigment and an eradicable colorant; a kit including the highlightable ink and an eradicator solution; an ink complex including a colorless or substantially colorless eradicable dye selected from the group consisting of diarylmethane derivatives, triarylmethane derivatives, and methine dyes, and a colored pigment; and methods of applying an eradicator to at least a portion of a marking made with a highlightable ink, are disclosed herein.

Abstract: A highlightable mixture, such as an ink, including a colored pigment, an eradicable colorant, and a non-eradicable colorant; a kit including the highlightable mixture and an eradicator fluid; an colorant complex including a colorless or substantially colorless eradicable dye selected from the group consisting of diarylmethane derivatives, triarylmethane derivatives, and methine dyes, and a colored pigment; and methods of applying an eradicator to at least a portion of a marking made with a highlightable mixture, are described herein.

Abstract: A highlightable mixture, such as an ink, including a colored pigment, an eradicable colorant, and a non-eradicable colorant; a kit including the highlightable mixture and an eradicator solution; colorant complex including a colorless or substantially colorless eradicable dye selected from the group consisting of diarylmethane derivatives, triarylmethane derivatives, and methine dyes, and a colored pigment; and methods of applying an eradicator to at least a portion of a marking made with a highlightable mixture, are described herein.

Abstract: A fluid control system for writing instruments, correction fluid dispensers and self contained paint brush and paint reservoirs is disclosed. The fluid control system includes two filters or reservoirs, including a hydrophobic filter/reservoir and a hydrophilic filter/reservoir. The hydrophobic and hydrophilic elements may be spaced adjacent to and in abutting engagement with each other or a gap or space may be disposed therebetween. The hydrophobic element is disposed adjacent to the fluid reservoir (i.e., ink, correction fluid, paint reservoir or other water based fluid) and the hydrophilic element is disposed adjacent to the applicator tip or brush.

Abstract: An improved fluid control system for a paint brush or applicator system that includes a flexible barrel-type reservoir is disclosed. The disclosed valve systems may be of a ball-valve type, a trumpet-type or a duck-bill type. The valve or control systems help the user regulate the flow of fluid from a flexible barrel reservoir to a brush or applicator tip by adequately restricting flow in response to squeezing pressure applied by the user to the flexible barrel reservoir.