hi,all, like most cyclebuffs i like a smatter of good plating on a classy frameset, however a conversation recently cropped up with a cycle buddy and friend who have just taken delivery of 2 new custom frames from Mercian Derby ENGLAND. while my friend had a road path fixed machine his pal had a geared machine with loads of chrome , this guy is a good repeat customer of the Derby builders and is having the managing director staying over for a leisure weekend in the late spring. he has the run of the works while he is with them at the shop, DERBY PLATING are the platers which Mercian use and supposedly the best in the UK . will not chrome old accles and pollock or 753 /853.. this new track iron machine is Reynolds 631 has no plating at all .. the experienced and ready to retire frame builder commended his chrome free choice and told him that plating had always deadened a frames response this is a strongly held belief among many of the old builder
. willie carton coleraine n. ireland.. WHERE IT SEEMS LIKE THE BIKE WILL BE IN THE SHED FOR A FEW MORE DREARY DAYS..... BLOODY WEATHER!!!!
Stronglight49@aol.com wrote: Chrome is a very durable finish and definitely useful for potentially high-abrasion areas like lower stays and fork blades. The added weight of a chrome finish was probably why we did not often see this on the highest level pro-quality racing bikes since the 1960s.
There are several other reasons why we seldom see chromed framesets today, but they are not entirely extinct. You will still see relatively inexpensive BMX/Freestyle bikes and Low-rider bike frames in full chrome. However, because OSHA has deemed the process to be very hazardous to health and the EPA has very realistic concerns about the final containment of all the highly hazardous chemicals used, these bikes are generally made in third world countries where both workers and the environment may be shown little regard. Regardless of the risks, the companies which do commit to plating OEM frames generally do a good job because they are familiar with working with bike frames and their livelihoods depend on producing consistently good quality output.
Most of the reputable large commercial after-market platers in the US have now removed chrome plating from their offerings. Nevertheless, there are some fine smaller companies which will still chrome plate anything from auto bumpers to bike frames, but you should be sure that they are very familiar with the particular needs of hand brazed bicycle frames - which are not the same as plating simple flat sections of steel.
One of the issues (and I may have read this in the CR archives) is the potential for weakening the bottom bracket if certain precautions are not taken when cooling the finished frameset (a lot of heat is generated during the plating process).
Also, the entire frameset must be completely cleaned by several processes. Organic solvent degreasing, alkaline cleaning, and then finally acid dipping or "pickling" - where the metal is dipped in an acid bath to remove any surface oxides or "smuts" remaining on the steel before plating. And any acid salts which have entered the frame tubes, including through any of the small-heat release holes originally drilled into the stays and fork blades during brazing, will later have to be neutralized.
It is also very expensive to complete a proper triple strate plating process which will commonly consist of first a layer of copper, then nickel, and then finally chrome, and perhaps more than one layer of chrome for a good show quality "wet look" finish. Enamel can hide a lot, but because any imperfections will be very evident and may even be more pronounced when seen through the plating, it is best to wet sand or even polish the base layer of copper, sometimes more than once, before moving on toward the final finish layers. So, it really is a lot of work, especially if you want a visually flawless chromed frameset. And I would not begrudge what may seem like an excessive cost - so long as your plater does a good job.
Bob Hanson, Albuquerque, NM USA
____________________________________ From: Emanuel Lowi
What are the reasons for and against fully chroming frames?
I note that only occasionally are they encountered, and
almost never seen done on new bikes.
What's the good and the bad of it?
Emanuel Lowi
(who agrees that jamming two nuts together by
overtightening is a baaad - NOT GETO - idea)
Montreal, Quebec
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