Glass Test Tube with Cork Cap

2015 hotsale glass test tube with corkAtesttube,alsoknownasaculturetubeorsampletube,isacommonpieceoflaboratoryglasswareconsistingofafinger-likelengthofglassorclearplastictubing,openatthetop,usuallywitharoundedU-shapedbottom.
Alargetesttubespecificallyforboilingliquidsiscalledaboilingtube.
Testtubesareavailableinamultitudeoflengthsandwidths,typicallyfrom10to20mmwideand50to200mmlong.[1]Thetopoftenfeaturesaflaredliptoaidpouringoutthecontents;somesourcesconsiderthatthepresenceofalipiswhatdistinguishesatesttubefromaculturetube.[2]Atesttubehaseitheraflatbottom,aroundbottom,oraconicalbottom.Sometesttubesaremadetoacceptagroundglassstopperorascrewcap.Theyareoftenprovidedwithasmallgroundglassorwhiteglazeareanearthetopforlabellingwithapencil.
Application:
Testtubesarewidelyusedbychemiststohold,mix,orheatsmallquantitiesofsolidorliquidchemicals,especiallyforqualitativeexperimentsandassays.Theirroundbottomandstraightsidesminimizemasslosswhenpouring,makethemeasiertoclean,andallowconvenientmonitoringofthecontents.Thelong,narrowneckslowsdownthespreadingofvapoursandgasestotheenvironment.
Atesttubefilledwithwaterandupturnedintoawater-filledbeakerisoftenusedtocapturegases,e.g.inelectrolysisdemonstrations.
Culturetubesareoftenusedinbiologyforhandlingandculturingallkindsofliveorganisms,suchasmolds,bacteria,seedlings,plantcuttings,etc.;andinmedicineandforensicstostoresamplesofbloodorotherfluids.
Atesttubewithastopperisoftenusedfortemporarystorageofchemicalorbiologicalsamples.
Testtubesareusuallyheldinspecial-purposeracks,clamps,ortongs.Someracksforculturetubesaredesignedtoholdthetubesinanearlyhorizontalposition,soastomaximizethesurfaceoftheculturemediuminside.
Testtubesaresometimesputtocasualusesoutsideoflabenvironments,e.g.asflowervases,glasswareforcertainweakshots,orcontainersforspices.
Wherelargenumbersoftestsarerunoronlysmallamountsareavailablefortesting,orboth,microtiterplatesareoftenusedassmalltesttubes.Manufacture:
Testtubesforphysicsandchemistryareusuallymadeofglassforbetterresistancetoheatandcorrosivechemicalsandlongerlife.Tubesmadefromexpansion-resistantglasses,suchasborosilicateglass,canbeplaceddirectlyoveraBunsenburnerflame.
Culturetubesforbiologyareusuallymadeofclearplastic(suchaspolystyreneorpolypropylene)byinjectionmolding[3]andareoftendiscardedafteruse.
Testtubesmaycomewithpreparedcontents.Forexample,abluetoptubeisatesttubeof5mlcontainingsodiumcitrateasananticoagulant,usedtocollectspecimensforcoagulationscreensandtestingforglucose-6-phosphatedehydrogenase.[4]Atesttubeisveryresistantandcanusuallywithstandtemperaturesover300degreesC.
(FromWikipedia:http:https://en.wikipedia.org/wiki/Test_tube)
Test tube:
Product description:
We can produce any sizes according to request.
Material: Neutral glass tube or borosilicate 3.3 glass tube.
We can print logo and text on all type of test tube.
Standard: ISO and YBB.
Yearly output: 200 million.
Normal sizes: (Outside Diameter*Length)
6*50mm
8*50mm
10*75mm
12*75mm
13*100mm
15*100mm
15*125mm
15*150mm
16*100mm
16*125mm
16*150mm
18*150mm