Rhubarb
PN100642
- Regular price
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$15 - Regular price
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$15 - Sale price
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$15
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Free shipping on orders over $75*
Rhubarb is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 30mL volume will provide approximately 37 standard converter refills assuming a 0.8mL draw. Our ink swatch is produced with a cotton swab on Tomoe River paper.
Enjoy Rhubarb as a standalone fountain pen ink, or blend it with other Birmingham Pen Co. fountain pen inks to craft your personalized shade.
Handcrafted Inks, Right From The Source.
Unparalleled Versatility
Our fountain pen inks are crafted to blend seamlessly with the others within Formula, offering the possibility of creating an essentially limitless array of custom hues. Enjoy each color in the original chroma glory, or split it up and make something entirely unique.
Exceptional Value
Skip the middleman and get your best value by purchasing directly from a maker. Use our Atomink Element mixing recipes to experience our color catalog for pennies on the dollar compared to purchasing individually packaged samples.
Reduce waste, save time, and spend less.
Straight From The Maker
As a tiny Pennsylvania based manufacturer with only two full-time employees, we're here to stand behind your purchase with expert guidance and support, directly from the makers.
Ink Particulars
Formula Guide
We've compartmentalized our fountain pen ink recipes into four principal categories characterized by differentiating elements of the colorant component in the formula. A colorant is a dye or pigment that exhibits color. An ink vehicle is a series of chemicals used to transport colorant from storage reservoir to substrate (paper in our case).
Keystone Formula inks are engineered using water-soluble dyes to produce a broad spectrum of colors with a variety of unique and desirable writing properties. Fitting the bill for a traditional fountain pen ink, this series by far the most popular.
Delicate Formula inks are constructed with dyes selected for both performance and washability. Colors in this series will clean easily from most fabrics and surfaces with soap and water.
Everlasting Formula inks are compounded with pigmented colorants to produce highly water resistant and archival properties on paper.
Twinkle Formula inks are formulated using hybrid dye and pigment combinations to create a unique twinkling luster.
Sample Recipe
Shipping
Free shipping on orders over $75.*
$9 for all other orders.
Our target is to deliver all standard domestic orders within 7-12 days from the order date, which includes both preparation and shipping transit time. For fast order processing within 1-2 business days on average, our part-time fulfillment team ships completed orders from Reading, Pennsylvania
*Free shipping offers apply to orders shipped within the USA, excluding Alaska, Hawaii, and outlying territories. See our shipping policy for more details.
QUALITY IN THE DETAILS
Ink ingredients are meticulously combined and refined over roughly two dozen steps with a minimum of three thorough mixing steps per color to ensure quality & consistency within every batch.
SMALL, MIGHTY, & PROUD
With only two full-time employees, every product is thoughtfully prepared at our Pennsylvania workshop just north of Pittsburgh.