Funtek Factory Inspection Standard

Sintered Stone Quality Tolerance & Inspection Standard

Published acceptance limits and inspection methods for dimensions, thickness, flatness, diagonal, surface appearance, shade, batch traceability, defects, and export packing.

Length and width tolerance: ±2 mm
Thickness tolerance: ±0.3 mm
Flatness: ≤3 mm over 3200 mm or ≤0.3%

±2 mmLength and width

±0.3 mmThickness

500–1000 lxInspection lighting

1.5 mViewing distance

01 / DIMENSIONAL ACCEPTANCE

Measure Size, Thickness, Diagonal, Edge Straightness, and Flatness on a Supported Slab

Condition the slab on a clean, rigid, level support before measurement. Record the calibrated instrument, slab ID, batch, ambient condition, measurement location, actual result, and inspector.

Inspection item	Funtek acceptance	Method	Record
Length	Nominal ±2 mm	Measure both long edges with a calibrated steel tape.	Left and right values
Width	Nominal ±2 mm	Measure both short edges.	Top and bottom values
Thickness	Nominal ±0.3 mm	Measure with a calibrated calliper at not fewer than eight perimeter points, away from chips.	Minimum, maximum, average
Diagonal difference	≤3 mm	Measure corner-to-corner in both directions on the same supported slab.	D1, D2, and difference
Edge straightness	≤1.5 mm per metre	Use a straightedge and feeler gauge along the factory edge.	Maximum gap and position
Flatness / warpage	≤3 mm over 3200 mm or ≤0.3%	Place on a level reference support; check the maximum gap without forcing the sheet flat.	Face-up and, when required, face-down

Measurement rule: do not reject a large slab for apparent bow while it is leaning in a rack. Transfer it to the defined inspection support, allow it to settle, and measure the unsupported gap using the same method on both parties’ reports.

02 / SURFACE & APPEARANCE

Inspect the Finished Face at 1.5 Metres Under 500–1000 Lux Neutral White Light

Clean the surface first. Inspect for approximately 10 seconds from the normal viewing position, then move closer only to classify a visible condition. Raking light may be used for polished-surface scratches but does not replace normal-view acceptance.

VIEWING SETUP

1.5 m / 500–1000 lux

Use neutral white lighting and a consistent viewing angle. Record unusual side light, wet surface, protective film, dust, or reflections that affect the result.

SURFACE DEFECTS

Classify by visibility and location

Record scratch, pinhole, pit, glaze spot, contamination, print defect, chip, crack, edge damage, or gloss variation with size, count, and coordinates.

MARBLE PATTERN

Vein is not a defect

Judge the approved design, finish, face plan, and batch—not whether every slab repeats the same natural-looking vein position.

Automatic hold conditions

Through-body crack or crack extending from an edge or opening.

Structural edge damage entering a finished part or planned cut line.

Wrong product, body type, thickness, finish, face, or direction.

Bookmatch set missing a required A/B or numbered sequence face.

Shade or batch mixed without the customer’s written approval.

Contamination, moisture, or packing damage that prevents reliable inspection.

03 / SHADE, BATCH & FACE CONTROL

Every Slab Must Trace Back to Production Batch and Project Position

Traceability field	Required record	Where it appears	Why it matters
Product identity	Product name/code, body type, format, thickness, finish	Order, slab label, packing list	Prevents visually similar products from being mixed.
Production batch	Batch number and production date	Slab label and QC report	Links shade, process, and factory inspection records.
Shade code	Approved shade group or sample reference	QC report and package label	Keeps one visible elevation within an approved shade range.
Face identity	A/B or sequential face number	Slab back, approval elevation, crate list	Protects bookmatch and continuous-vein order.
Direction	Permanent top arrow	Slab back and cut-part label	Prevents rotated or inverted installation.
Package position	Rack/crate number and loading sequence	Packing list and external package mark	Connects factory packing to site unloading and installation.

Batch rule: do not mix production batches on one uninterrupted wall, island, reception front, or other focal elevation unless the dry layout has been photographed and accepted in writing.

04 / ORDER INSPECTION PLAN

Inspect Critical Identity and Structural Conditions at 100%; Sample Routine Measurements by Lot

Control point	Inspection level	Hold / release condition
Product, format, thickness, finish, quantity	100% identity check	Any mismatch holds the affected package.
Cracks, major edge damage, face identity, direction	100% visual/label check	Cracked slab, wrong face, or missing direction holds the slab.
Bookmatch / continuous sequence	100% against approved elevation	Sequence must match the signed layout before packing.
Length, width, diagonal, thickness, straightness	First-off plus defined lot sample	Out-of-tolerance result triggers recheck and expanded sampling.
Flatness	Defined lot sample on reference support	Any failure triggers confirmation method and expanded sampling.
Shade / surface comparison	Representative dry layout by visible elevation	Release after approved sample/batch or customer sign-off.

Pre-shipment QC record

Purchase order, customer drawing revision, and approved sample reference.

Product count by code, size, thickness, finish, face, and batch.

Instrument ID and calibration status for tape, calliper, straightedge, and lux meter.

Measured results with slab IDs—not only “PASS”.

Surface and edge photos showing label and defect coordinates.

Bookmatch dry layout or numbered elevation comparison.

Rack/crate protection, straps, labels, centre of gravity, and gross weight.

Container condition, blocking/bracing, seal number, and loading photographs.

05 / PACKING & RECEIVING

Quality Acceptance Continues Through Packing, Loading, Unloading, and Site Storage

FACTORY PACKING

Protect face, edge, and sequence

Use separators, corner/edge protection, rigid rack or crate, controlled strap position, weather protection, and labels visible without unloading the full package.

CONTAINER LOADING

Restrain the complete rack

Record rack gross weight, centre of gravity, blocking/bracing, floor condition, door clearance, seal number, and photographs before the doors close.

RECEIVING

Photograph before movement

Check container, seal, rack position, straps, moisture, impact signs, and package labels. Report transport damage before dismantling the evidence.

Claim evidence: identify the slab, face, batch, rack, container, defect location, and package condition. Provide wide, mid-range, and close-up photographs plus the delivery and unloading timeline.

FUNTEK TECHNICAL LIBRARY

Use the Four Documents as One Project-Control System

The product data sheet defines what is supplied; the face guide defines what is seen; the fabrication manual defines how it is processed and supported; the quality standard defines how it is accepted.

Fabrication & Installation

Radii, cutouts, overhang, support, joints, sinks, and cutting sequence.

Technical Data Sheet

Body groups, formats, thicknesses, finishes, tests, and slab weights.

Face & Bookmatch Guide

A/B faces, direction, sequence, layouts, labels, and spare planning.

Quality & Inspection

Dimensional tolerance, surface checks, batch, shade, packing, and claims.

Send the latest drawing, not only a colour reference.

Include application, product, body type, finish, format, thickness, quantity, face requirement, processing, destination, and project schedule. Funtek will return the material route and factory review points with the quotation.