Question

vat polymerization technologies (vat)
use the information below to answer the question.
vat polymerization was first used in the 1980s and is the oldest type of 3d printing
technology that is used today. currently, the two most commonly used methods
are stereolithography (sla) and direct laser processing (dlp)
material used
the material used in this process comes in a liquid resin form. the printers vat is filled
with the liquid polymer and then a laser or an ultraviolet light source is used to cure
the material, creating each layer. this process uses a thermoset polymer, which means
once it has been cured, it hardens and can not be melted down and repurposed.
dimensional accuracy
one of the advantages of vat polymerization is the dimensional accuracy of the
printed parts. in this process, the material is cured, rather than melted.
printing process
in a \bottom - up\ printer, the vat that contains the resin has a clear base. the build
plate is lowered from the top of the vat until it touches the bottom. the plate will
then raise slightly so that it is no longer in contact with the bottom of the vat. this
allows the resin to flow in, filling the space in between.
once the build plate is in position, the light source will shine through the window onto
the plate. the resin that is hit by the light will cure and harden onto the build plate,
creating the first layer of the build. the plate will then raise slightly, allowing more
resin to flow into the gap. afterward, it will lower back down and position itself at the
right location for the next layer. this cycle repeats until the entire form has been built.
what are the two most common vat polymerization
methods?
stereolithography (sla) and direct laser processing (dlp)
fused filament fabrication (fff) and powder bed fusion (pbf)
thermoplastic binding (tb) and polymer distribution (pd)
material jetting (mj) and binder jetting (bj)

Explanation:

The text clearly states "Currently, the two most commonly used methods are Stereolithography (SLA) and Direct Laser Processing (DLP)".

Answer:

Stereolithography (SLA) and Direct Laser Processing (DLP)