Souboku Pigmented Blue-Black Ink
Sailor's Pigmented inks are permanent and water-resistant, so they're great for important letters and documents. Souboku is a rich blue-black color. Pigmented inks contain tiny particles which can clog up a pen if it sits for too long without writing, so it's best to clean your pen regularly when using them.
Staff pick! Jean says: "These permanent and strongly water-resistant inks are my favorite when I'm writing something that I want to keep. They write smoothly, are easy to maintain compared to most permanent inks, and rarely bleed or feather, even on copy paper."
- Pigment-based fountain pen ink
- Available in 50 ml bottle or 4 ml sample
Looking for a different shade of ink? Our ink comparison chart shows all the colors side-by-side.
Shipping
Online orders are packaged within 2–3 business days after purchase and are typically sent via USPS Priority Mail. If a shipping carrier is not specified at checkout, we may use similar services such as UPS Ground or USPS First-Class Mail that could take an additional 2–3 days to arrive at your address.
Customers who would like to pick up their orders may select the Pick Up option at checkout. Completed orders are available for pickup during our regular shop hours:
Monday-Saturday: 11am–6pm
Sunday: 11am–5pm
If you prefer curbside pickup, please call (617) 928-9898 when you arrive outside.
Local Area Delivery
For customers who live within three miles of The Paper Mouse, we offer local area delivery services when you make a purchase on our website.
Customers with eligible addresses will see a local delivery option at checkout when placing an order online. Delivery has a flat-rate fee of $5. Orders will be delivered after 5pm on the next business day after the order is received.
International Shipping
International orders may be subject to import fees, duties, or tariffs that are determined by the country of delivery. The Paper Mouse is not responsible for these charges, nor are we able to calculate them prior to shipment. We advise that you work with your local Customs office to determine these charges prior to placing an order.
If a shipment is refused due to unwanted fees, duties, or tariffs imposed by Customs in the country of delivery, you will be charged for both original and return shipping, as well as all associated fees.
Please understand that delays due to Customs processing are out of our control.
Out of Stock Items
In the event that an item you purchased goes out of stock, we will attempt to contact you to see if you wish to exchange with a different item or receive a refund. If we are unable to reach you within 72 hours, we will automatically refund the unavailable item and ship the remainder of the order to you.
Returns and Exchanges
We accept returns and exchanges for unused or defective items for up to 30 days with proof of purchase. Returns and exchanges on food, calendars, dated planners, and engaged pens are not accepted. Customers are responsible for return shipping costs. For more details, please see our Refund Policy.