Tissue Embedding Rings, PS, White — 258-4010-W10 | 500/Bag | Caplugs® Evergreen

Tissue Embedding Rings — High Impact Polystyrene, White, 500/Bag (258-4010-W10)

These white High Impact Polystyrene (HIPS) tissue embedding rings hold the tissue cassette base in correct orientation within the embedding mold during paraffin infiltration at standard histology embedding center temperatures (56–65°C). Supplied non-sterile in a convenient 500/Bag pack, part number 258-4010-W10 is engineered for the full histology solvent sequence — paraffin wax, xylene and xylene substitutes, ethanol, IPA, and 10% NBF formalin — making them suitable for high-throughput surgical pathology cores that process hundreds of blocks per shift. Precise dimensional fit with standard histology cassette bases ensures consistent tissue orientation and paraffin block face geometry, directly affecting section quality, ribbon continuity, and the number of diagnostic-quality levels obtainable per block.

Technical Specifications

Applications

• Surgical biopsy embedding — prostate needle core, cervical biopsy, skin punch biopsy; the ring holds cassette-base position during paraffin infiltration to ensure proper tissue orientation
• Endoscopic biopsy processing — GI mucosal, esophageal, and gastric specimens requiring precise block face geometry for thin-section diagnostics
• High-throughput surgical pathology workflows where consistent paraffin block quality is critical to section ribbon continuity and level yield
• Color-coded specimen management programs — white serves as the neutral default for general specimens, with other colors reserved for specific diagnostic categories

Chemical Resistance

Quality & Procurement

Made in USA, these Caplugs® Evergreen tissue embedding rings are manufactured from a rubber-toughened High Impact Polystyrene matrix — not standard PS — chosen specifically because it withstands the thermal cycling, xylene exposure, and mechanical handling forces of histology tissue processing without the brittleness or cracking that limits conventional polystyrene at embedding temperatures. The white pigmentation is compounded directly into the HIPS matrix rather than applied as a surface coating, ensuring permanent color retention through repeated solvent exposure. Rings are BPA-free and contain no phthalate plasticizers. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered pricing available for high-volume surgical pathology and anatomical pathology departments. The full Caplugs® Evergreen color range — Pink (258-4011-P10), Blue (258-4012-B10), Green (258-4013-G10), and Yellow (258-4014-Y10) — is available from the same source, enabling complete color-scheme procurement from a single vendor.

Frequently Asked Questions

Why are these made from HIPS rather than standard polystyrene?
High Impact Polystyrene is rubber-toughened, giving it the flexibility and solvent resistance needed to survive the thermal cycling and xylene exposure of a standard histology embedding workflow. Standard PS is more brittle and prone to cracking under the same conditions, which can disrupt tissue orientation and block quality.

Are these embedding rings compatible with xylene substitutes such as HistoClear or Sub-X?
Yes — the HIPS material is compatible with xylene and xylene substitutes, as well as all ethanol concentrations, IPA, 10% NBF formalin, and paraffin wax at standard embedding center temperatures (56–65°C).

Will white rings fit standard histology cassette bases from other manufacturers?
These rings are dimensioned for standard histology cassette bases used across major embedding center platforms. If your lab uses non-standard cassette formats, verify the fit before transitioning from your current supplier.

Can I order other colors to build a color-coded embedding program?
Yes — LabSupplies.com carries the complete Caplugs® Evergreen tissue embedding ring color range, including Pink, Blue, Green, and Yellow, allowing your lab to procure an entire color-coding scheme from a single authorized dealer.