
Rolled and Glued Body
The vertical joined seam is a normal and necessary part of this manufacturing method.
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CLEAR CYLINDERS
Clear PET cylinders and PVC cylinders are rolled and glued from sheet. They are not seamless injection-molded containers; top and bottom caps are separate components.

HISTORICAL PRODUCT PHOTOS
These real examples show rolled clear bodies, visible joined seams and separate top and bottom caps rather than seamless molded jars.
Photos are from the former Lung-Lin website media library and document historical products or applications. Product names and trademarks shown belong to their respective owners. Current diameter, height, sheet thickness, cap fit and printing feasibility require sample confirmation.
CONSTRUCTION & CAP TOOLING
Confirm inside/outside diameter, cylinder height, sheet thickness, cap fit, printing and packing method before ordering.

The vertical joined seam is a normal and necessary part of this manufacturing method.

For non-round shapes, foldable polygon or square clear boxes use crease lines, tabs and seams.
| Round-cap / mold reference diameters (cm) | 5, 5.55, 6.65, 7.75, 8.85, 9, 10, 10.5, 11.3, 12, 12.5, 13, 13.5, 14, 15, 16, 18, 20.25 (handmade), 25 (insert style), 30 (insert style) |
|---|---|
| Cylinder body height | Normally up to 350 mm; shorter heights can be evaluated by product and quantity |
| Sheet thickness | 0.20, 0.25, 0.30, 0.35 and 0.40 mm |
| Materials | PET or PVC |
| Opening treatment | No rolled edge or a single rolled edge; confirm the treatment against sheet thickness, dimensions and cap-fit samples |
| Cap configuration | Separate top and bottom caps for standard cylinders; fit, cap depth and stock must be confirmed when quoting |
The 20 values are cap or mold reference labels, not guaranteed finished inside or outside diameters. The 20.25 cm handmade and 25/30 cm insert styles need individual construction and component review; do not assume standard caps are in stock. Confirm sheet thickness, cap fit and usable space with a sample.
PRINTED CYLINDER REFERENCES
PET and PVC bodies use UV printing with white ink and spot colors evaluated by artwork. Surface printing requires an anti-scratch treatment. Artwork must leave the vertical overlap seam and the lower gluing/cap-fit area completely unprinted.
AI-assisted print and structure references, not photographs of completed Lung-Lin production. Ink adhesion, registration, glue-margin width, bottom clearance, cap fit and production feasibility require material and sample confirmation.
CUSTOM PACKAGING INQUIRY
Overseas orders are accepted. Buyers arrange the carrier and transport, with pickup from Lung-Lin after completion.