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Form 4
Photo: Formlabs Inc. · CC BY 4.0 (opens commons.wikimedia.org)

Form 4

by FormlabsUS

ScalingStage 5 of 5

Shipping since 2024; Formlabs' main resin printer.

Updated 16 Oct 2024Checked 25 Sep0 updates this week

Milestones

Next · Expand production and dental applications
  1. Form 1 KickstarterOct 2012Complete.
  2. Form 3 launchedApr 2019Complete.
  3. Fuse 1 benchtop SLS ships2021Complete.
  4. Form 4 and Form 4B launchedApr 2024Complete.
  5. Expand production and dental applicationsNowCurrent milestone.

Most important updates

  • 16 Oct 2024
  • Apr 2024

Current obstacles

  • Screens wear outStrong UV light slowly damages the LCD, so it must be replaced and kept cool.

Physics limits

  • Each layer must be peeled off the tankEvery cured layer sticks to the tank floor and must be pulled free. Peel and suction forces grow with layer area, limiting speed and causing failures on large, solid cross-sections.
  • LCD masks waste most of the lightAn LCD passes only a small share of the UV behind it and the rest turns to heat. UV also slowly degrades the screen, so light power and screen life trade off.
  • Cured resin shrinks and stays brittleLiquid resin shrinks by several percent as it hardens, pulling parts slightly out of shape. The cross-linked plastics tend to be more brittle or creep more than moulded thermoplastics.

How it works

2 parts
A small LCD resin printer mid-print: the part hangs from the platform above a resin tray lit from below by a screen, the same method as the Form 4
A small LCD resin printer mid-print: the part hangs from the platform above a resin tray lit from below by a screen, the same method as the Form 4Photo: Tampere Hacklab · CC BY 2.0 (opens commons.wikimedia.org)
Light

Light through an LCD

Rows of LEDs shine through an LCD screen that blocks light everywhere except the layer's shape.

Tank

Soft film

A flexible film under the resin lets each layer peel off gently, protecting fine details.

Papers & demos

1 item
  1. Apr 2024demo
    Form 4 and Low Force Display printing (opens formlabs.com)Brought fast LCD-based resin printing to professional printers with Formlabs' materials.

Update log

2 updates

Wed 16 Oct 2024

  • Minor: PressHardware

Apr 2024

  • Major: BlogHardware

About Formlabs

The team behind Form 4

Formlabs

Desktop resin (SLA) and SLS 3D printers

Formlabs makes professional desktop 3D printers, plus their materials and software: the Form resin printers and the Fuse nylon-powder printers. Founded in 2011 by MIT Media Lab students, it is one of the biggest sellers of professional printers, strong in dental and engineering.

  • Put professional resin printing on the desktop with Form 1 (2012 Kickstarter), then powder printing with Fuse 1.
  • Form 4 (2024) hardens a whole layer at once with an LCD screen, several times faster than Form 3.
  • Last priced round: $150M at $2B in May 2021, led by SoftBank Vision Fund 2.
Founded
201115 yrs
Headquarters
United States
Status
Private
Valuation
private
Raised
$153M2 rounds
Last round
Series E · $150MMay 2021$2B post
Works in
ManufacturingPlastic 3D printing
Coverage
2 programs · 8 updateslatest 9 Jun 2026checked 25 Sep
Lead investors
SoftBank Vision Fund 2
People
Max LobovskyCo-founder & CEO
Primer