Plumb Type Foundry
Imaginary since 2026

Specimen No. 06
The variable issue

Set in Roboto Flex
13 axes, one file

Move the pointer.
The letters lean in.

Plumb is a foundry that does not exist, showing off three typefaces that do. Every letter on this page is live text in a variable font. Nothing is an image. Push the letters around, then set your own and copy the CSS.

01

Width

wdth 25 to 151. Each line stretches from compressed to extended as it crosses your screen.

Line A / wght 900wdth

One font file.

Line B / wght 260wdth

Every width

Line C / wght 700wdth

From narrow

Line D / wght 1000wdth

To wide open.

A traditional family needs a separate file for Condensed, Normal and Extended. A variable font draws the two extremes once and lets the browser work out everything between them, live, at any size.

That is what you are scrolling. The four lines above are one font at four weights, and the width is tied straight to the scroll position. No canvas, no images, no script doing the stretching.

Fig. 1
CSS animation-timeline: view()

02

Weight

wght 100 to 1000. Hairline at the bottom of the screen, extra black by the middle.

Weight

Nine named weights is a habit left over from metal type. Here there are nine hundred and one. If Regular feels a touch thin on a dark background, ask for 437. If Bold shouts, try 655. The number on the left is the real weight of the word above, right now.

03

Axis parade

    Heft
    01 / 13
    wght
    Weight

    1001000
    100
    04

    Drawer

    Three open source typefaces. Hover a row to wake it up, click to load it in the tester.

    05

    Glyphs

    117 characters. Hover or tap one. The orange shadow is the same glyph at the heaviest weight.

    R
    Glyph
    R
    Unicode
    U+0052
    HTML
    R
    Class
    Uppercase
    Advance / 1000
    0
    06

    Tester

    Type your own words, drag the axes, then copy the link tag and the CSS. They reproduce exactly what you see.

    Typeface
    Presetsthey animate
    Axes13
    Settingsize / leading / tracking
    1 / Link tag for the head
    2 / CSS
    07

    Colophon

    Sets itself. The fresh letters arrive at grade 150 and dry to grade 0 without moving their neighbours.

    Paper #F3F0E8
    Ink #000000
    Hot #FF4F00
    Keys: G grid, I invert Back to the tester