The structural base is usually an engineered thermoplastic or a cast resin. Common substrates are ABS (acrylonitrile butadiene styrene) for injection‑molded press‑ons and PMMA/resin systems for cast pieces. ABS offers a balance of flexibility and impact resistance suitable for reusable press‑ons; PMMA/resin delivers a harder, higher‑gloss substrate preferred when the 3D elements are integrated during casting. Material selection affects edge retention, bond behavior with adhesives/primers, and thermal stability during curing or finishing.

Yes — traditional 3D sculpting uses acrylic powder (polymer beads, typically PMMA copolymers) combined with a liquid monomer to create a polymerizing paste. In professional practice, ethyl methacrylate (EMA)‑based systems replace methyl methacrylate (MMA) because MMA is strongly discouraged by industry bodies due to irreversible bonding and health risks. Acrylic sculpting produces durable, hand‑shaped 3D forms (flowers, ridges) that mechanically lock to porous or primed substrates; however, it produces VOCs and requires ventilation and technician PPE during application.

There are three practical resin families used: (1) UV photopolymer gels (builder/hard gels) cure under LED/UV and are reworkable only mechanically; (2) UV/LED liquid resins and epoxies can be used for domes and encapsulation — UV resins cure rapidly but require proper photoinitiators and post‑cure to reduce sticky surface; (3) two‑part epoxies/polyurethanes for high‑hardness domes and charms. Gels are lower‑odor and favored in salons; epoxies give higher scratch resistance but longer cure and potential skin sensitizers. Choose based on desired hardness, yellowing resistance, and compatibility with planned finishing (buffing, polishing, topcoats).

Adhesive choice depends on intended wear time and removability. For salon application where longevity and thin profile matter, cyanoacrylate (nail glue) remains the industry standard for 7–14+ day wear on properly prepped nail plates. For reusable press‑ons or temporary wear, double‑sided nail tabs or removable gel adhesives (silicone‑based or water‑permeable gel pads) offer safer, low‑damage removal. Important safety notes: avoid consumer use of industrial adhesives; implement primers/acid-free primers correctly; and design adhesive protocols to avoid long exposure to acetone for removal, which damages some substrates and 3D embellishments.

Lightweight, fatigue‑resistant plastics like ABS, polycarbonate (PC) and cellulose acetate butyrate (CAB) are commonly used for injection‑molded press‑ons. ABS is most common because it machines well, accepts printing/painting, and has sufficient flex to reduce edge cracking. PC gives higher impact strength but can be stiffer and more prone to adhesive incompatibility without surface treatment. For very thin, flexible reusable nails, thermoformed TPE blends are used but have limited high‑gloss finishing options; choose plastic by balancing production method, finishing workflow, and desired reuse profile.

Embellishments—glass crystals (Swarovski), acrylic gems, metallic foils, pearls, and resin domes—each change removal and wear dynamics. Glass and cubic zirconia give excellent abrasion resistance but concentrate stress at glue joints; larger fixed crystals require stronger adhesives and careful acetone‑resistant bonding methods. Acrylic rhinestones and faux pearls are lighter and easier to remove but scratch sooner. Epoxy or UV resin encapsulation increases durability but complicates soak‑off removal and raises solvent exposure for technicians. Always specify embellishment attachment and sealing methods in the service protocol to align with customer removal expectations and to minimize substrate or natural nail damage.