Guaranteed Quality Parameters of Cerva Bohemia s.r.o. – handmade production

 

Specification	Description of accepted imperfections / limits
dimensions and limits
	base dimensions according to approved drawings:
	products with height/diameter under 150mm – within the limit +/- 2 mm
	products with height/diameter over 150mm – within the limit +/- 3 mm
	difference of bottom thickness: +/- 1 mm for products with diameter under 100mm, +/- 2mm for diameter over 100mm
	diameter of stem +/- 1 mm, thickness of footplate +/- 1 mm
	difference within the wall thickness on one product (on the rim) +/- 1,5 mm
	accepted ellipticity +/- 2 mm
shape of product	according to approved drawings or reference samples
	Edge/Rim in the upper 20mm	Body/Side surface	Base
melt quality
bubble /blister
small size of product	1 small bubble (under size 1 mm)	1 small bubble (under size 1 mm)	1 small bubble (under size 1mm)
under 150 mm	accepted	1 middle bubble (under size 2 mm)	1 middle bubble (under size 2mm)
		accepted (not close to each other)	accepted (not close to each other)
big size of product	1 small bubble (under size 1 mm)	2 small bubbles (under size 2 mm)	2 small bubbles (under size 2mm)
over 150 mm	accepted	1 middle bubble (under size 3 mm)	1 middle bubble (under size 3mm)
		accepted (not in scrum)	accepted (not in scrum)
open blister / or bubble	not accepted	not accepted	not accepted
on the surface
cords / threads	One light cord/thread is accepted (visible from distance 1m). The cords should not surround the
	products, neither affect the visual aspect.
white stone/unmelted	not accepted	not accepted	not accepted
iron	not accepted	one small piece (max.size 1 mm)	one small piece (max. size 1mm)
color melt	specification of colors according to Cerva Bohemia s.r.o. design book,
	with regard to the production technique, a slight difference of color tints is
	allowed because we depend on purchased raw material from suppliers, some dark dots or dirt inside of melt are possible,
	also a slight difference of color tints between different products are accepted
forming
mould or tool marks	light mould / tool marks are	light mould / tool marks are	more visible mould / tool marks
	accepted, but just partly (max.	accepted, but just partly (max.	underneath the bottom are
	1/3 diameter of body)	1/3 diameter of body)	accepted
wavy surface	not accepted	just very light, more like optics are	not accepted
		accepted for big sizes (over 150mm)
stability of footplate /	N.A.	N.A.	should be flat, just a small rocking
bottom			can be accepted (max. 0,3mm),
			if more, then the bottom is grinded and
			fine polished
cracks	not allowed	not allowed	not allowed
finishing/decoration
rim edge	straight rim, round edge with	N.A.	N.A.
	correct grinding and fine polish,
	sharp point or glass chips are
	unaccepted
manipulation scratches	generally unaccepted, just very thin scratches with max.length of 4 mm can be accepted
	(max. 2 pieces on the product)
sticked glass pieces	not accepted	not accepted	not accepted
dirt (fired or dusty)	not accepted	not accepted	not accepted
sandblasted logo	N.A.	correct shape, position, visible and	correct shape, position, visible and
		readable, without the rest of sand	readable (from the top or bottom)
gold/platinum painting	the line (wheel) in the rim or body can be a little uneven, within the		the line (wheel) on the footplate can be
	thickness limit +/- 0,5mm,		a little uneven, within the thickness limit
	ornaments or other motives with slight uneven edge is accepted, when		+/- 0,5 mm
	not intruding with the visual aspect.		some small holes (under 0,1mm) in painting
	some small holes in gold (under 0,1mm) in painting place are accepted		place are accepted

 

engraving / Panto, Diaryt	ornaments or other motives are engraved according to approved artworks,
	some small deviations are possible:
	missing points (with length under 1mm), 2 – 3 pcs on a product
	slight diffences between the line thickness or depth of engraving,
	when not intruding with the visual aspect
color spatter	color tints available according to Pantone book,
	the color surface should be smooth without rough places, the slight semolina or cluster of color is accepted on
	difficult shapes of product.
	a slight difference of color tints or hammered (orange) surface are accepted, when not intruding with the visual aspect.
tension /annealing	all products have been annealed and they are safe, the tension is controlled with a polaroscope or tested with a
	diamond cutter

 

NOTES:

All products with decoration (gold, platinum, color spatter) are not supposed to be washed in a dishwasher!

The decorated products must be stocked in dry warehouse or places (especially gold can rust when stored in a humid place) .

The prices are calculated based on the forementioned quality standards. Therefore, any complaints afterwards regarding this specific quality will not be accepted. Another quality of the final product is possible according to client´s request, but with a revised and separate price calculation.

 

 

 

 

CERVA BOHEMIA s.r.o.	KVĚTNÁ 1794	GLASSWORKS
Aviatická 1092/8, Ruzyně	www.kvetna1794.com	Nám. E. Zahna 329
161 00 Praha 6	info@kvetna1794.cz	687 66 Strání – Květná
Czech Republic	Phone: +420 739 500 994	Czech Republic
info@cervabohemia.com		phone: + 420 572 619 111
date-box: zwfkzas
VAT: CZ 047 87 528