Pla vs Silk Pla: Which Filament Should You Buy?

pla vs silk pla comes down to finish and purpose. Plain PLA leans matte for everyday parts, models and workshop pieces, while silk PLA gives a glossy, silky look for display pieces that catch light. For a maker selling printed goods, the choice is less about which filament is stronger in the abstract and more about which finish suits the piece in hand.

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pla vs silk pla: what changes, and what stays the same

The main change is finish. Plain PLA leans matte and plain, while silk PLA leans glossy and silky, which suits display pieces, ornaments and models meant to be seen. The SUNLU listings in the gear section state settings for plain PLA and PLA+ spools. They do not state settings for silk PLA, so silk settings are Not stated here, and no silk spool appears among the four spools in the gear section.

What stays the same is the family: both sides are PLA filament for FDM printers, and the plain spools here list a diameter of 1.75mm with a dimensional accuracy of +/-0.02mm. A silk diameter is Not stated in these listings, so this guide does not carry that figure over from plain PLA. Finish, color and the settings stated for the spool in hand matter more than the family name alone.

Plain PLA settings the listings state

SUNLU PLA, Black, 1KG states a nozzle temperature of 200-230°C, a bed temperature of 50-65°C, and a printing speed of 50-100mm/s. Its spool diameter is 8.00 inches, its spool width is 2.50 inches, and its spool hub hole diameter is 2.20 inches. The listing also claims a neat winding rate of 100 percent, with no clogs, bubbles, or tangles, and excellent layer adhesion.

SUNLU PLA+ 2.0, Black, 1KG states a nozzle temperature of 205-220°C, a bed temperature of 50-60°C, and a print speed of 100-300mm/s, with fast printing up to 300mm/s. Its spool diameter is 195mm, its spool width is 57mm, and its spool hub hole diameter is 63mm. The listing describes the filament as more resistant to brittleness and cracking than standard PLA+ filament, with vacuum packaging and a reusable spool.

By contrast, the two ELEGOO listings in the gear section do not state nozzle, bed, or speed settings in their bullets. Their settings are Not stated, which is a gap to note before choosing a spool on settings alone.

Gear picks: 4 spools from the listings, ranked

SUNLU PLA+ 2.0, Black, 1KG. This spool ranks first here because its listing states the widest speed range in the set, with printing up to 300mm/s, plus a claim of greater resistance to brittleness and cracking than standard PLA+ filament. It lists a diameter of 1.75mm, an accuracy of +/-0.02mm, vacuum packaging, and a reusable spool with a diameter of 195mm. It also states a warranty term of 30-Day. It suits makers who want functional parts, high-precision models, and decorative items. It is a weaker match for a maker who wants a plain matte PLA look, since this is an upgraded PLA+ spool rather than plain PLA.

SUNLU PLA, Black, 1KG. This spool ranks next because its listing states a full settings set, with a nozzle temperature of 200-230°C, a bed temperature of 50-65°C, and a printing speed of 50-100mm/s. It lists a diameter of 1.75mm, an accuracy of +/-0.02mm, and a spool diameter of 8.00 inches. The listing claims neat winding at a rate of 100 percent and smooth printing. It suits beginners and experienced users, in the listing’s own words. It is a weaker match for a maker who needs printing up to 300mm/s, since that speed figure belongs to the PLA+ 2.0 spool, not this spool.

ELEGOO PLA, Black, 1KG, cardboard spool. This spool lists a diameter of 1.75mm, an accuracy of +/-0.02mm, and a weight of 2.2lbs. The listing claims low warp and shrinkage, an odorless print, a glossy surface finish, and superb layer bonding. It also states that the filament is dried before packaging and vacuum sealed to protect it from moisture. It states a guarantee term of 30 day for quality reasons. It suits makers who want a glossy surface from a plain PLA spool. It is a weaker match for a maker who needs stated nozzle, bed, or speed settings, since those settings are Not stated for this spool.

ELEGOO PLA, Brown, 1KG. This spool lists a diameter of 1.75mm, an accuracy of +/-0.02mm, and a weight of 2.2lbs. The listing claims low warp and shrinkage, an odorless print, neat winding, and strong layer adhesion. It also states that the filament is dried before packaging and vacuum sealed to protect it from moisture, and it lists wide compatibility with Neptune series, P1P, P1S, Ender series, and Kobra series printers. No warranty term is stated for this spool. One point needs care: the spec table Size field lists 0.068 Inch, which is not a spool weight, so it does not contradict the 1kg spool in the title and bullets. It suits beginners and makers who want a brown spool. It is a weaker match for a maker who needs a stated warranty term or stated nozzle, bed, or speed settings, since those figures are Not stated for this spool.

How to choose between plain PLA and silk PLA

Start with the piece, not the spool. Choose plain PLA for everyday parts, workshop pieces, and functional parts where finish is secondary, checking the listing for finish, since one plain PLA listing here claims a glossy surface. Choose silk PLA for display pieces where a glossy, silky sheen is the point of the print. Then check the spool in hand: diameter, stated settings, spool dimensions, and any stated warranty term, rather than assuming one spool matches another.

• For matte parts: plain PLA, after checking the settings stated for the spool in hand.
• For display pieces: silk PLA, where a glossy sheen suits the piece.
• For functional parts: PLA+ 2.0, which the listing describes as tougher and more resistant to brittleness and cracking than standard PLA+ filament.
• For a glossy plain PLA surface: ELEGOO PLA, Black, 1KG, which claims a glossy surface finish without being a silk PLA spool.

Do not assume that silk settings match plain settings. The plain settings in this guide come from plain PLA and PLA+ listings, and silk settings are Not stated here. Also do not assume that spool dimensions match across brands: one spool lists a spool diameter of 8.00 inches, while another lists a spool diameter of 195mm, so check the spool holder and the listing before ordering.

Mistakes to avoid

• Assuming a silk spool is in the gear section: none of the four spools here is described as silk PLA in its listing.
• Carrying plain PLA settings over to silk PLA: silk settings are Not stated in these listings.
• Assuming all spools share spool dimensions: the listed diameters differ, so check the spool in hand.
• Ignoring storage: the listings that mention packaging describe vacuum sealing or vacuum packaging to protect filament from moisture.

FAQ: lasers and CNC

Can silk PLA print with plain PLA settings?

Not stated in these listings. The plain PLA settings stated here are a nozzle temperature of 200-230°C, a bed temperature of 50-65°C, and a printing speed of 50-100mm/s for SUNLU PLA, Black, 1KG. Use the settings stated for the silk spool in hand, since no silk spool appears in these listings.

Is silk PLA stronger than plain PLA?

Not stated in these listings for silk PLA. The strength claim in these listings belongs to SUNLU PLA+ 2.0, Black, 1KG, which the listing describes as more resistant to brittleness and cracking than standard PLA+ filament. That claim does not transfer to silk PLA.

Does plain PLA always give a matte finish?

Not always in these listings. Plain PLA leans matte in general, yet ELEGOO PLA, Black, 1KG claims a glossy surface finish. Finish varies by listing, so read the listing for the spool in hand rather than assuming a single plain PLA look.

What diameter do these spools use?

Each of the four spools lists a diameter of 1.75mm, with a dimensional accuracy of +/-0.02mm. That figure is stated for plain PLA and PLA+ spools here. A silk diameter is Not stated in these listings.

Which spool suits a beginner?

SUNLU PLA, Black, 1KG is described in its listing as ideal for beginners and experienced users. ELEGOO PLA, Brown, 1KG is described in its listing as easy to use and set up, and ideal for beginners. Either description suits a beginner, while settings and color should decide between them.

Related: silk PLA vs PLA plus, silk PLA vs matte PLA, PLA vs PLA plus filament and PLA vs PETG filament.