Are these water-based ink? i plan to write with these pens on blank blu ray discs (bd-r and bd-r dl discs)

Universal pen for use on almost all surfaces Suitable for overhead projection Also suitable for use on CDs/DVDs Excellent smudge-proof and waterproof qualities on almost all surfaces Dries in seconds, therefore ideal for left-handed users Permanent, low-odour ink Lightfast colours: black, brown Weatherproof colour black Stand-up STAEDTLER box PP barrel and cap guarantee long service life DRY SAFE can be left uncapped for days without drying up (Test ISO 554) Airplane-safe - automatic pressure equalization prevents pen from leaking on board aircraft Xylene and toluene-free ink Superb colour brilliancy p2-services.

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STAEDTLER

Product ID: 50340236

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Details

Brand
STAEDTLER
Ink colour
Assorted
Number of items
4
Point type
Medium
Recommended uses for product
Writing

⏳Dry safe technology: uncapped for days without drying

💧Smudge-proof & waterproof ink for lasting impact

🖊️1.0mm medium line for precise, bold strokes

Description

🖋️ Elevate your mark—permanent, precise, and always ready to impress!

UNSTOPPABLE INK - Dry safe formula means no panic if you forget to recap—ready when you are.
DESK READY DESIGN - Comes in a sleek stand-up box for easy access and stylish organization.
BOLD BALANCED LINES - 1.0mm medium tip delivers professional, clear markings every time.
VIBRANT ASSORTED COLORS - Pack of 4 assorted hues to brighten your workspace and ideas.
UNIVERSAL SURFACE MASTERY - Writes flawlessly on overhead films, plastics, glass, and more—your all-surface solution.

The STAEDTLER 317 WP4 Lumocolor Permanent Pen pack includes 4 assorted colors with a 1.0mm medium tip, designed for universal use on nearly all surfaces. Featuring smudge-proof, waterproof ink and dry safe technology, these pens stay fresh uncapped for days. Packaged in a convenient desktop stand, they combine durability with professional-grade performance.

Specifications

Manufacturer	Staedtler
Brand	STAEDTLER
Model Number	317 WP4 ST
Product Dimensions	15.09 x 1.8 x 5.11 cm; 50 g
Batteries	1 A batteries required.
Colour	Assorted Colours
Grip Type	Standard
Material Type	Polypropylene (PP)
Number of Items	4
Size	1 count (Pack of 4)
Point Type	Medium
Line Size	1 Millimetres
Ink Colour	Assorted Colours
Manufacturer Part Number	317 WP4 ST
Item Weight	50 g

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