PUK Workshop 2025

Expertise through knowledge


professional precision welding with the PUK

**Welcome to the Boley workshop on 17 & 18 May 2025 in Stuttgart **

You can now register for our professional workshop on PUK fine welding. We will provide you with comprehensive support and offer you a practical exchange of experience with our qualified speaker.

Under the leadership of Ms Susanne Englert, master silversmith and current teacher at the stately Drawing Academy in Hanau, we are offering you this workshop with extensive training and exchange of experience on 17 & 18 May 2025 at our premises in Stuttgart. You will be trained on the latest ‘PUK 6.1’ equipment from Lampert Werktechnik and only need to bring your own pieces of jewellery and watches as practice pieces.

We have the following focal points in store for you on this workshop weekend:

• Applying metals
• Welding silver
• Carrying out ring changes
• Welding ear studs
• Welding of settings
• Repair of metal bands
• Reconditioning of watch cases
• Treatment of your individual special applications

Please note that the number of participants is limited to ten. We therefore look forward to receiving your prompt confirmation using the PDF registration form attached below or simply send us your written confirmation to support@boley.de.

Did you already know?

Gold purchase


The problem of testing gold jewellery

Authenticating gold jewellery is a major challenge. Due to the very diverse geometries (rings, necklaces and ear studs, etc.) and the composition (different mixed gold alloys in different carats), it is impossible to determine gold jewellery exactly using only one test method. The most common types of counterfeit jewellery are

  • Counterfeit jewellery with base metals: This refers to the plating of a base metal with gold. This often occurs with rings or chains made of tungsten or tungsten carbide, whereby these materials almost perfectly imitate the density and thus the “heavy feeling” and feel of real gold jewellery.
  • Under-alloying / hallmark fraud: If the gold content of an alloy is lower than specified by the hallmark.
  • This can also be done in an even more sophisticated way, in that the surface of the piece of jewellery has the correct alloy and the underlying material is worthless foreign material or an inferior alloy.

Due to the large number of different types of gold alloys and jewellery geometries, the testing of jewellery is more demanding than that of gold bars, for example. The following testing methods should therefore be available when purchasing jewellery.

1. Electrochemical testing using the "CaratScreenPen ".
The CaratScreenPen uses an electrochemical process to determine the purity and fine gold content on the surface of gold and platinum jewellery. The measuring tip forms a so-called “galvanic cell” on contact with the object lying on the measuring surface. This results in a certain electrochemical behaviour, which is registered by the measuring tip and processed by the device.

2. density scale "DensityScreenScale "
You can use the density scales to quickly and precisely determine the density of all types of materials. It is equally suitable for analysing bars and gold jewellery to determine their purity and alloy composition and to determine bars or jewellery that have been “stretched” or under-alloyed with silver or copper. The density is determined using the tried and tested method of Archimedes: To do this, the object is weighed with a sieve under water and once “normally”. The density can be determined directly from the two different values. This gives you an insight into the quality and carat of the gold or even an initial indication of the possible presence of forgeries. Determining the authenticity and gold content of geometrically irregular objects such as jewellery is therefore no problem.

3. magnetic scale "MagneticScreenScale "
A sustainable method for measuring bars and coins is to determine the so-called magnetic susceptibility properties. This makes it possible to determine, even through blister packs and packaging up to a certain thickness, whether the material applied has the correct magnetic behaviour - para- or diamagnetic, i.e. attractive or repulsive. A so-called “tungsten detector” can be used to determine the presence of a potential foreign body: a gold bar as a so-called diamagnet displaces a magnetic field, creating pressure on the measuring head of the scale and displaying a positive value. If a supposedly genuine fine gold bar is placed on the scale and a negative value appears, it is in most cases a fake.

4. surface testing with test acids or X-ray fluorescence analysis

  • The gold coating sample with test acids: In principle, the first, relatively simple and cost-effective step is to determine the gold content using gold test acids.
  • X-ray fluorescence analysis (XRF): This determines the exact elemental composition of the jewellery on the surface. This method is very expensive (approx. 15,000 - 45,000 EUR) and is purely superficial: the maximum penetration depth is only 0.010 mm.

The complete and detailed article on the methods of gold testing can be found here:

Trends and highlights

Inhorgenta 2025


Trends & highlights from Inhorgenta Munich 2025

INHORGENTA 2025, Europe's leading platform for jewellery, watches, gemstones and technology, once again set new standards from 21 to 24 February 2025: with over 25,000 trade visitors from around 100 countries and 1,338 brands from 38 countries, INHORGENTA 2025 got off to an impressive start to the year. With an increase in visitors of just under 1 per cent and exhibitors of 3.4 per cent compared to 2024 and a foreign share of around 40 per cent, the growth figures are more modest than in previous years, but they prove the increasing internationalisation of this trade fair.

GEBRÜDER BOLEY celebrated 165 years of commitment and passion for its customers at the trade fair. To mark the occasion, visitors to the stand were presented with a surprise package containing a wide range of tools and care products. Team Boley and the two owners, supported by Pascal Lutz - who has been actively involved with Boley for 2 years - and Marco Lutz, who will join them later this year, were delighted to welcome numerous new and regular customers.

GEBRÜDER BOLEY can look back on a successful trade fair. This year's sales focussed on the following trade fair trends and highlights:

  1. everything around the gold purchase: Precision scales for buying gold, gold analysis scales, testing devices for determining the gold content of jewellery, bars and coins
  2. testing equipment for analysing the authenticity of colourless gemstones to differentiate between simili, moissanites, laboratory-grown diamonds (CVD / HPHT) and natural diamonds
  3. CNC-controlled engraving machinen for the personalisation of watches, jewellery and daily necessities
  4. newly revised casing tables with integrated ‘Leica’ microscope units and extensive accessories

‘We were once again positively surprised by the number of visitors and the international character of the trade fair and will certainly not miss the 52nd INHORGENTA next year,’ says Michael Lutz, Managing Partner of GEBRÜDER BOLEY.

Inhorgenta

165 years of Gebrüder Boley


the generation change is imminent!

This year Gebrueder Boley proudly celebrates 165 years of commitment and passion for its customers. Over 10,000 retail customers from more than 60 countries rely on the expertise of the company expertise of the company, which as a full-range supplier of watch and jewellery technology more than 120,000 articles.

To mark its anniversary, Gebrüder Boley is not only presenting the latest innovations at the INHORGENTA 2025 trade fair, but also the next generation of the company's management. Pascal and Marco Lutz are the successors in what is now the fifth generation. Visitors can look forward to innovative products and trade fair novelties such as the

the new generation of Flexbo 4.0 drum tables
• The new generation of Flexbo 4.0 setter’s benches
• the ‘Leica Ivesta’ setter’s microscope sets
• the computer-controlled engraving machine ‘GravoTech M20X’ with user-friendly touchscreen
• the next generation of GRS setting and graving systems powered by compressed air
• New burs innovations from Busch, made of carbide steel
• Furthermore, combined testing devices for the differentiation of natural and synthetic diamonds, the so-called ‘lab-growns’, will be the focus of attention.

Visit us at the you will find us in hall C2, booth No. 302. We look forward to your visit!

Your Boley exhibition team

Hortoec

Special Inhorgenta offer


Horotec supports Gebrüder Boley at the Inhorgenta 2025 traide fair
10% Discount on all Horotec Tools

Did you know that Horotec from La Chaux-de-Fonds in Switzerland, the world-renowned supplier of watchmaking and precision engineering tools, and Gebrüder Boley have been working together successfully for several decades?

And this co-operation is growing from year to year, so that Boley is currently one of Horotec's leading sales partners worldwide. Both companies co-operate regularly at trade fairs and other events. At the INHORGENTA stand of Boley in Hall C2, Horotec will be presenting the following interesting innovations, among others:

• Universal tool for milling, drilling and deburring (Boley Art.-No. 514700)
• Dial kit for setting the dial feet (Boley Art.-No. 514710)
• Professional grinding tool for screwdriver blades (Boley Art.-No. 511266)

You will also benefit from a 10% discount on all HOROTEC tools in February 2025. You can experience many of these tools live at the Boley stand at INHORGENTA.

In addition, Boley stocks over 300 Horotec tools online. If you cannot find a Horotec reference in our online shop, please enquire via chat or email by support@boley.de for the price and availability. We can usually get you the desired Horotec item at short notice.

Your Boley Team

Voucher code: HOROTEC25 (valid until 28/02/2025)

Did you know ?

backorders


Do you already know all our shop functions?

Backorders ready for delivery
You can now quickly see on the homepage whether your backorders are ready for delivery. When you log in, a green dot appears on the ‘shopping basket’ symbol. The number inside the dot indicates the quantity of backorders ready for delivery. The number in the red dot represents the number of products in the shopping basket.

In the shopping basket you will then find a detailed list of the backorders ready for delivery with your order date and the quantity of backorders. This arrangement gives you an overview of your current shopping basket and your backorders and should therefore prevent the risk of double orders.


Chat function
Use the quick and uncomplicated contact with us via the chat function. Simply write to us with your questions or requests. We will get back to you as soon as possible.

Never miss a message from us and always have a complete overview of all information from us.

new frame work tables 2025

Vicenzaoro & Inhorgenta


The new generation of work tables for setters and engravers “Flexbo 4.0”, which are ergonomically designed, have been proven to improve working conditions and efficiency in the setting and engraving handcraft. They have been further developed in close cooperation with setters and engravers and are characterized by their ergonomics in several respects: all workbenches are electrically height-adjustable as standard and impress with many well thought-out, ergonomic detail solutions.

The new workbenches are available in two versions: as workbenches with pull-out board or as workbenches with work bowl.

The setters‘ benches with pull-out board are extremely stable so that you can carry out all types of jewellery work onengraving blocks on the individually adjustable and lockable pull-out board without jolting. The filing drawer underneath is
used either to collect filing residues or as a tool drawer for storing files, hand gravers, etc.

On the setters‘ benches with work recess, the setter works in a recess set into the worktable, in which he can place his engraving block and a the setter’s microscope ‘floating’ above it. This variant allows the setter to work conventionally on the worktable top and not on a pull-out board underneath. It is particularly favoured in classic jewellery-making countries such as Italy.

Did you know ?

stress corrosion cracking


Who hasn't had a disappointed customer who has returned to your shop with a defective 8ct or 9ct piece of jewellery shortly after purchase or repair? In some cases, the jewellery parts have completely crumbled or the newly attached clasp has disintegrated into several components?

The most common cause of this physical destruction is stress corrosion cracking. This phenomenon occurs when cracks form in materials under the influence of stresses and corrosive media.

Stress corrosion cracking is characterised by the fact that deformed alloys crack under the influence of certain chemicals without any apparent external influence. The main triggering influences are stress states, alloy composition and chemicals.

Low-carat alloys below a fineness of 585/- are particularly susceptible to stress corrosion cracking. For example, 8ct or 9ct often contains high levels of additives such as zinc. Such jewellery / findings / wires can be damaged even after a short period of wear, especially if they come into contact with corrosive substances such as ammonia, ammonium salts or sulphur dioxide.

Read the entire article on stress corrosion cracking here.

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