Prusament PLA Jet Black: problems, parts and running costs

Checked: 2026-10-23

Summary

Prusament PLA Jet Black is a 1 kg, 1.75 mm PLA from Prusa Research that owners have reported clogging, feed loops and first-layer adhesion trouble on some spools, with no representative failure rate published. [1][15][16]

Common problems and fixes

Underextrusion and nozzle clogging on some spools — a Prusa forum thread from July 2022 reports stopped extrusion, extruder clicking and only temporary relief from cold pulls on exact Jet Black PLA, with drying not fixing the first report; spools dated December 5, 2022 and bought in August 2023 drew similar complaints, and one owner reported failure after 6-7 hours; speed reduction helped one owner. Warranty covers genuine material defects but a used spool is not an ordinary return, so contact support with the invoice and spool code. [7][19][20]
2025-made spool reported in 2026 — a spool manufactured December 20-21, 2025 and bought February 2026 clogged and ran at temperatures ordinarily associated with PETG; owners speculated mislabeled material, but no manufacturer confirmation or chemical identification was found, so escalate the suspect spool with its identifying code rather than raising print temperatures. [8]
Feed loops and blocked filament — in May 2026 an owner reported snapped or stuck filament on two Prusa machines and a strand caught under another winding; other commenters diagnosed a trapped loop, and Prusa explains that letting the free filament end slip can itself create a crossed-over loop. Keep the free end clipped when unloading. [9][14]
First-layer adhesion on smooth PEI — an April 2025 owner with Prusament PLA Jet Black and silver on a Prusa MK4 reported poor smooth-sheet adhesion that improved on satin; a single case cannot establish a line-wide defect, so check bed prep, sheet choice and Z offset first. [10]
Rough small-feature finish and mild stringing — a September 2020 owner found Jet Black PLA rougher on fine detail than eSUN PLA+, and generic retraction or temperature changes did not fully resolve it; other users report very good finish at other speeds, so results are machine and profile dependent. [11]
Sheen varies with temperature and speed — owners report glossy layers around 215 °C and a more matte look around 190 °C, with a nearly matte appearance at 150+ mm/s; alternating fast infill with slow perimeters can leave visibly different sheen in one part, so run a small appearance test when finish matters. [23][24]

Parts and consumables

Prusament PLA Jet Black, 1.75 mm, 1 kg full spool (product IDs 17704 / 3414) — $29.99 at Prusa’s US listing in October 2026; repurchased as consumed, with the spool included. [1]
Prusament PLA Jet Black 1 kg refill, Made in USA (SKU 016627564603) — $26.99 at Printed Solid in October 2026; usable only with a compatible older refillable spool, and Printed Solid states it is not compatible with Prusa NFC spools. A collection page showed an unconfirmed $21.59. [12][22]
Prusament PLA Jet Black, 2 kg spool — $49.99 at Prusa’s US listing in October 2026, about $25.00/kg; buy only if the feeder and holder accept the larger spool. [15]
Standard 0.4 mm brass nozzle — compatible per Prusa but not included with the spool; no special hardened nozzle and no manufacturer-specified replacement interval for unfilled PLA Jet Black. [1]

Yearly running cost

A typical owner’s recurring cost is filament. At the verified $29.99 per 1 kg spool: 1 kg per year is $29.99, 3 kg per year is $89.97 and 5 kg per year is $149.95, before tax and shipping. Using the 2 kg spool at $49.99 works out to $25.00/kg. These are worked examples, not surveyed owner usage. [1][15]

Drying is only needed when the filament is genuinely wet: Prusa recommends 45 °C for 6 hours, with dry storage and desiccant otherwise. No annual electricity figure can be estimated without a specific dryer’s power draw and cycle count. [13]

These figures exclude printer electricity, labor, failed prints, nozzles, storage gear and shipping. There is no proprietary consumable lock-in or subscription for this filament. [1][2][13]

When it is a good buy

Prusa’s US listing showed $29.99 for the 1 kg spool in October 2026 and Printed Solid showed $37.99 for the NFC spool. [1][2]

$25.00/kg or less — a good buy for the full 1 kg spool if shipping is reasonable; this is roughly $5/kg below the verified $29.99 price. [1][15]
$29.99 regular price — a deliberate premium purchase for spool traceability, a particular color and finish, or batch repeatability. [1][21]

Named alternatives (October 2026, US):

ELEGOO PLA Black — $13.99/kg. Better for rough drafts and high-volume indoor decorative prints where cost matters more than traceability or a particular black sheen. [16]
ELEGOO PLA Pro Black — $16.99/kg. Better when an inexpensive enhanced-stiffness PLA is acceptable and black shade matching is not strict; use an appropriate profile. [17]

An in-brand bulk option is the Prusament Jet Black 2 kg spool at $49.99, about $25.00/kg, for users committed to the exact same black who can mount the larger roll. [15]